What does sobig worm do?

The SoBig worm is a type of computer virus that was first identified in 2003. It spreads through email attachments, often disguised as legitimate files, and can replicate itself by sending copies to contacts in the infected user's address book. Once activated, it can also download additional malicious software and create backdoors for unauthorized access to infected systems. The worm significantly impacted email systems and networks due to its rapid spread and the volume of spam it generated.