1. Added embed-element to work with IE11 (and Firefox). Removed browser-requirements for ActiveX (clsid and method).
2. Added Cache-Control header on SWF-download to avoid AV-detection (no disk caching = no antivirus-analysis :).
Testing performed:
Successfully tested with Adobe Flash Player 13.0.0.182 with IE9, IE10 and IE11 running on Windows 7SP1. (Exploit will trigger on FF29, although sandboxed.)