This tool creates licence keys that you can use to illegally register software.
Because it is often distributed the same way as malware, you may be at risk of further infection. A common tactic used by malware is to pretend to be a tool like this one.
Microsoft security software finds malware on more than half of the PCs where we detect this tool. You can read more about this in the Volume 13 of the Security Intelligence Report.
The following are some threats often found on PCs where we also see this tool:
This tool can appear in a number of different ways, depending on what software the tool is trying to give you keys for.
The following is an example of a key generator for Adobe Photoshop CS3:
Volume 13 of the Security Intelligence Report
takes a more detailed look at Win32/Keygen.
You can find out more about software piracy, and the risks associated with software piracy, on the Microsoft piracy site.
Analysis by Francis Allan Tan Seng
Alerts from your security software may be the only symptom.