London, Sept 17: Internet crime is becoming a major commercial activity, a report by the security firm, Symantec, has revealed.

Millions of email addresses are being sold over the Internet and details of bank accounts and credit cards are being offered on underworld auction sites, the firm said.

Trade in commercial software used by criminals to launch attacks on websites is also showing a rising trend, and criminals are using trusted sites like MySpace and Facebook to launch attacks on users' computers, it added.