mirror of
https://github.com/vxunderground/MalwareSourceCode
synced 2024-06-16 03:58:34 +00:00
242 lines
5.7 KiB
NASM
242 lines
5.7 KiB
NASM
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PAGE 59,132
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;ÛÛÛÛÛÛÛÛÛÛÛÛÛÛÛÛÛÛÛÛÛÛÛÛÛÛÛÛÛÛÛÛÛÛÛÛÛÛÛÛÛÛÛÛÛÛÛÛÛÛÛÛÛÛÛÛÛÛÛÛÛÛÛÛÛÛÛÛÛÛÛÛÛÛ
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;ÛÛ ÛÛ
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;ÛÛ ZEP ÛÛ
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;ÛÛ ÛÛ
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;ÛÛ Created: 12-Nov-92 ÛÛ
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;ÛÛ Passes: 5 Analysis Options on: none ÛÛ
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;ÛÛ ÛÛ
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;ÛÛÛÛÛÛÛÛÛÛÛÛÛÛÛÛÛÛÛÛÛÛÛÛÛÛÛÛÛÛÛÛÛÛÛÛÛÛÛÛÛÛÛÛÛÛÛÛÛÛÛÛÛÛÛÛÛÛÛÛÛÛÛÛÛÛÛÛÛÛÛÛÛÛ
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data_1e equ 0A0h
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data_9e equ 418h ;*
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seg_a segment byte public
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assume cs:seg_a, ds:seg_a
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org 100h
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zep proc far
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start:
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jmp short loc_1
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db 90h
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data_2 db 0
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data_3 dw 216h
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db 2
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data_4 dw 0
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db 'TheDraw COM file Screen Save'
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db 1Ah
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data_5 db 'Unsupported Video Mode', 0Dh, 0Ah
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db '$'
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loc_1:
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mov ah,0Fh
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int 10h ; Video display ah=functn 0Fh
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; get state, al=mode, bh=page
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; ah=columns on screen
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mov bx,0B800h
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cmp al,2
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je loc_2 ; Jump if equal
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cmp al,3
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je loc_2 ; Jump if equal
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mov data_2,0
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mov bx,0B000h
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cmp al,7
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je loc_2 ; Jump if equal
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mov dx,offset data_5 ; ('Unsupported Video Mode')
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mov ah,9
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int 21h ; DOS Services ah=function 09h
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; display char string at ds:dx
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retn
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loc_2:
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mov es,bx
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mov di,data_4
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mov si,offset data_6
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mov dx,3DAh
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mov bl,9
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mov cx,data_3
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cld ; Clear direction
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xor ax,ax ; Zero register
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locloop_4:
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lodsb ; String [si] to al
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cmp al,1Bh
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jne loc_5 ; Jump if not equal
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xor ah,80h
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jmp short loc_20
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loc_5:
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cmp al,10h
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jae loc_8 ; Jump if above or =
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and ah,0F0h
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or ah,al
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jmp short loc_20
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loc_8:
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cmp al,18h
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je loc_11 ; Jump if equal
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jnc loc_12 ; Jump if carry=0
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sub al,10h
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add al,al
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add al,al
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add al,al
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add al,al
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and ah,8Fh
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or ah,al
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jmp short loc_20
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loc_11:
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mov di,data_4
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add di,data_1e
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mov data_4,di
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jmp short loc_20
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loc_12:
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mov bp,cx
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mov cx,1
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cmp al,19h
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jne loc_13 ; Jump if not equal
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lodsb ; String [si] to al
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mov cl,al
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mov al,20h ; ' '
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dec bp
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jmp short loc_14
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loc_13:
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cmp al,1Ah
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jne loc_15 ; Jump if not equal
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lodsb ; String [si] to al
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dec bp
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mov cl,al
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lodsb ; String [si] to al
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dec bp
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loc_14:
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inc cx
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loc_15:
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cmp data_2,0
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je loc_18 ; Jump if equal
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mov bh,al
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locloop_16:
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in al,dx ; port 3DAh, CGA/EGA vid status
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rcr al,1 ; Rotate thru carry
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jc locloop_16 ; Jump if carry Set
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loc_17:
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in al,dx ; port 3DAh, CGA/EGA vid status
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and al,bl
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jnz loc_17 ; Jump if not zero
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mov al,bh
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stosw ; Store ax to es:[di]
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loop locloop_16 ; Loop if cx > 0
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jmp short loc_19
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loc_18:
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rep stosw ; Rep when cx >0 Store ax to es:[di]
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loc_19:
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mov cx,bp
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loc_20:
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jcxz loc_ret_21 ; Jump if cx=0
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loop locloop_4 ; Loop if cx > 0
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loc_ret_21:
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retn
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data_6 db 9
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db 10h, 19h, 45h, 18h, 19h, 1Bh
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db 01h,0D5h,0CDh,0CDh,0B8h, 04h
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db 0F3h, 09h,0A9h, 04h, 9Dh
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db 9
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db 0AAh, 04h,0F2h, 01h,0D5h,0CDh
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db 0CDh,0B8h, 19h, 1Ch, 18h, 19h
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db 12h,0D5h, 1Ah, 0Ah,0CDh,0BEh
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db 20h, 09h, 5Ch, 04h,0F6h, 09h
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db 2Fh, 20h, 01h,0D4h, 1Ah, 0Ah
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db 0CDh,0B8h, 19h, 13h, 18h, 19h
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db 03h,0C9h, 1Ah, 0Dh,0CDh,0BEh
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db 19h, 03h, 0Fh,0D2h,0B7h, 19h
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db 04h,0D6h, 1Ah, 03h,0C4h,0B7h
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db 20h,0D2h,0D2h,0C4h,0C4h,0C4h
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db 0B7h, 19h, 04h, 01h,0D4h, 1Ah
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db 0Eh,0CDh,0BBh, 19h, 03h, 18h
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db 19h, 03h,0BAh, 19h, 12h, 07h
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db 0BAh,0BAh, 19h, 04h,0BAh, 19h
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db 03h,0BDh, 20h,0BAh,0BAh, 19h
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db 02h,0D3h,0B7h, 19h, 13h, 01h
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db 0BAh, 19h, 03h, 18h, 19h, 03h
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db 0BAh, 19h, 07h, 0Bh, 1Ah, 02h
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db 04h, 19h, 07h, 08h,0BAh,0B6h
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db 19h, 04h,0C7h,0C4h,0B6h, 19h
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db 03h,0BAh,0B6h, 19h, 03h,0BAh
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db 19h, 07h, 0Bh, 1Ah, 02h, 04h
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db 19h, 08h, 01h,0BAh, 19h, 03h
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db 18h,0D6h,0C4h,0C4h, 20h,0BAh
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db 19h, 12h, 08h,0BAh,0D3h, 19h
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db 02h,0B7h, 20h,0BAh, 19h, 03h
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db 0B7h, 20h,0BAh,0D3h, 19h, 02h
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db 0D6h,0BDh, 19h, 13h, 01h,0BAh
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db 20h,0C4h,0C4h,0B7h, 18h,0D3h
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db 0C4h,0C4h,0C4h,0BDh, 19h, 12h
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db 08h,0D3h, 1Ah, 03h,0C4h,0BDh
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db 20h,0D3h, 1Ah, 03h,0C4h,0BDh
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db 20h,0D0h, 1Ah, 03h,0C4h,0BDh
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db 19h, 14h, 01h,0D3h,0C4h,0C4h
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db 0C4h,0BDh, 18h, 04h, 1Ah, 04h
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db 3Eh, 19h, 03h, 0Fh,0D6h, 1Ah
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db 04h,0C4h,0B7h, 20h,0D6h, 1Ah
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db 03h,0C4h,0B7h, 20h,0D2h,0D2h
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db 0C4h,0C4h,0C4h,0B7h, 20h,0D2h
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db 0D2h,0C4h,0C4h,0C4h,0B7h, 20h
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db 0D6h, 1Ah, 03h,0C4h,0B7h, 20h
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db 0D2h,0B7h, 19h, 04h,0D2h, 20h
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db 20h,0D2h,0D2h,0C4h,0C4h,0C4h
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db 0B7h, 19h, 03h, 04h, 1Ah, 04h
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db 3Ch, 18h, 01h,0D6h,0C4h,0C4h
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db 0C4h,0B7h, 19h, 07h, 07h,0D6h
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db 0C4h,0BDh
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dd 319BA20h ; Data table (indexed access)
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db 0BDh, 20h,0BAh,0BDh, 19h, 02h
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db 0BAh, 20h,0BAh,0BDh, 19h, 02h
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db 0BAh, 20h,0BAh, 19h, 03h,0BDh
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db 20h,0BAh,0BAh, 19h, 04h,0BAh
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db 20h, 20h,0BAh,0BAh, 19h, 02h
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db 0BAh, 19h, 03h, 01h,0D6h,0C4h
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db 0C4h,0C4h,0B7h, 18h,0D3h,0C4h
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db 0C4h, 20h,0BAh, 19h, 06h, 08h
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db 58h, 19h, 03h,0C7h,0C4h,0B6h
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db 19h, 03h,0BAh, 1Ah, 03h,0C4h
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db 0BDh, 20h,0BAh, 1Ah, 03h,0C4h
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db 0BDh, 20h,0C7h,0C4h,0B6h, 19h
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db 03h,0BAh,0B6h, 19h, 04h,0BAh
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db 20h, 20h,0BAh,0B6h, 19h, 02h
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db 0BAh, 19h, 03h, 01h,0BAh, 20h
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db 0C4h,0C4h,0BDh, 18h, 19h, 03h
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db 0BAh, 19h, 03h, 08h,0D6h,0C4h
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db 0BDh, 19h, 04h,0BAh, 19h, 03h
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db 0B7h, 20h,0BAh, 19h, 05h,0BAh
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db 19h, 05h,0BAh, 19h, 03h,0B7h
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db 20h,0BAh,0D3h, 19h, 02h,0B7h
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db 20h,0BAh, 20h, 20h,0BAh,0D3h
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db 19h, 02h,0BAh, 19h, 03h, 01h
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db 0BAh, 19h, 03h, 18h, 19h, 03h
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db 0BAh, 19h, 03h, 08h,0D3h, 1Ah
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db 04h,0C4h,0BDh, 20h,0D3h, 1Ah
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db 03h,0C4h,0BDh, 20h,0BDh, 19h
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db 05h,0BDh, 19h, 05h,0D3h, 1Ah
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db 03h,0C4h,0BDh, 20h,0D3h, 1Ah
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db 03h,0C4h,0BDh, 20h,0D0h, 20h
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db 20h,0D0h, 19h, 03h,0D0h, 19h
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db 03h, 01h,0BAh, 19h, 03h, 18h
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db 19h, 03h,0C8h, 1Ah, 15h,0CDh
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db 0B8h, 19h, 0Ch,0D5h, 1Ah, 16h
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db 0CDh,0BCh, 19h, 03h, 18h, 19h
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db 1Ah,0D4h,0CDh, 04h, 1Ah, 03h
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db 0F7h, 09h, 2Fh, 04h,0EAh, 09h
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db 5Ch, 04h, 1Ah, 03h,0F7h, 01h
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db 0CDh,0BEh, 19h, 1Bh, 18h
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zep endp
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seg_a ends
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end start
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