The Slammer worm fails to make it into the monthly charts of AV firms this month - despite becoming arguably the most damaging Internet worm ever.
The Avril worm topped the list of calls to antivirus firm Sophos, while email filtering firm MessageLabs again reports that Klez-H topped its nuisance list. The company blocked Klez-H more than 550,000 times over the last four weeks.
The non-appearance of Slammer of either chart is easily explained: AV software and services has a limited role in blocking Slammer. Slammer, a memory resident virus, needs to be combated with a combination of filtering the malicious traffic the worm generates and patching vulnerable boxes running vulnerable versions of SQL Server and MSDE.
AV software doesn't have much of a role here, despite the numerous alerts by firms in the sector over the last week
News source: The Reg