Another variant of the MyDoom worm, which spreads by sending copies of itself using its own SMTP engine and harvesting potential e-mail targets from search engines such as Google and Yahoo, was spreading quickly on Thursday.
Major Internet search engines were crippled Monday morning by a variant of the MyDoom worm, rendering Google inaccessible to many users and slowing results from Yahoo.
When security experts first detected a worm that uses Yahoo's People Search engine to harvest e-mail addresses, they assumed it was a new variant of MyDoom.
The latest variant of the MyDoom worm, which was discovered Tuesday, peaked after around 12 hours and has already started dying out, according to antivirus companies.
MyDoom is arguably the most successful mass mailing worm in history. One year after it was discovered, MyDoom has spawned more than 30 variants and is still evolving.
When security experts first detected a worm that uses Yahoo's People Search engine to harvest e-mail addresses, they assumed it was a new variant of MyDoom.
A new variant of the MyDoom worm, described variously as MyDoom.Q or MyDoom.O, was discovered on Tuesday that uses Yahoo's People Search to find new email addresses.
You can't hear them and you can't see them, but be warned, bots are all around us and they do have a search-and-destroy attitude that could be the death of your business.
See how Netsky, Bagle, and Mydoom variants have been causing havoc for corporate mail systems and learn how to blunt their attacks. Additional reading: Antivirus Resource Centre
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