"We didn't see a lot of these until recently," said Jamz Yaneza, the threat research manager for Trend Micro. "So far, they don't seem to be affecting users that much, although at least one Facebook group has been started by malware victims."
Yaneza said there is particular concern about a new variant of a dangerous worm, WORM_KOOBFACE.AZ. Within a very short period of time, the setup file for Koobface.AZ appeared on more than 300 servers, mostly in Asia, and Trend Micro expects that number to rise quickly. Researchers also estimate that as many as 20,000 PCs are being infected each day.
By Frederick Lane