Symantec Security Response: W32.HLLW.Fizzer@mm. - Level 3 (moderate)

Symantec Security Response is tracking a mass-mailing worm W32.HLLW.Fizzer@mm.

The worm sends itself to all contacts in the Windows Address Book and contains a backdoor that uses mIRC to communicate with a remote attacker. The worm also contains a keylogger that keeps track of keystrokes on a users system.

Security Response has rated the virus a level 3 on a scale of 1-5, with 5 being the most serious. The threat was upgraded this morning due to the number of submissions received by Security Response.

To date, Symantec is reporting 26 corporate submissions and a total of 146 submissions of the worm. For further information on the worm, please visit: http://securityresponse.symantec.com/