"Less than 24 hours after first being detected, the Swen blended-threat worm picked up steam Friday, gained a foothold in the US and the UK, and accounted for over 35,000 interceptions by e-mail filtering firm MessageLabs. Swen -- also called W32/Swen@MM, Gibe, and W32/Gibe-F -- masquerades as e-mail from Microsoft, and purports to carry a security update as its file attachment," reports TechWeb.
The e-mail exploits a bug fixed more than two years ago, here.
