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Happy99

Posted: March 31, 2005

Threat Metric

Threat Level: 9/10
Infected PCs: 44
First Seen: July 24, 2009
Last Seen: June 6, 2023
OS(es) Affected: Windows

Happy 99 emails itself to you as an attachment. After opening the attachment, you get a "Happy New Years 1999" message with a fireworks display. Happy 99 will then download two files onto your system: one is a Trojan that will not infect your computer unless you execute it, and the other file helps Happy 99 spread itself. Through this second file, Happy 99 will email itself to everyone on your contact list as the exact same email.

Technical Details

Registry Modifications

The following newly produced Registry Values are:

File name without pathhappy99.exeliste.skawsock32.ska

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