Comodo Antivirus Forwards Emulated API Calls To Real API

Comodo Antivirus includes a x86 emulator that is used to unpack and monitor obfuscated executables, this is common practice among antivirus products. The idea is that emulators can run the code safely for a short time, giving the sample enough time to unpack itself or do something that can be profiled. Needless to say, this is a very significant and complicated attack surface, as an attacker can trigger emulation simply by sending the victim an email or getting them to visit a website with zero user interaction. Multiple memory corruption issues have been found with the emulator.