Other:W32/GenPack is a Heuristic Detection of a file or program that behaves in a suspicious or potentially harmful manner.
This Heuristic Detection indicates that the suspect file was identified by a detection already available in our detection database, after it was generically unpacked in a virtual test system.
About Heuristic Detections
Heuristic analysis (also known as behavioral analysis) is an advanced type of antivirus technology that evaluates any potential threats by examining a suspected program's intended actions and effects on a computer system.
To examine a program's potential behavior, the antivirus program executes it in a self-contained, "virtual system" environment (also known as emulation). This allows the antivirus program to evaluate how the program's behavior affects the virtual system, without compromising or endangering the user's actual system.
A program that appears to perform suspicious or potentially malicious actions will trigger a Heuristic Detection, such as the one above.