A worm that started spreading on Sunday places the source code for the original MyDoom virus on victims' hard drives, an action equivalent to planting evidence, antivirus experts said Tuesday.
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.
Security experts warned on Friday that several new versions of MyDoom have surfaced on the Internet, suggesting that worm writers are taking a stab at improving the venerable virus.
Anti-virus companies say malware writers are undeterred by Microsoft's US$250,000 bounty after discovering another variant of the mass-mailing worm MyDoom over the weekend.
Antivirus companies are perplexed by a spate of recent viruses that contain messages in which the writers threaten to attack them.
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.
It's official: MyDoom is the fastest spreading e-mail virus or worm in computer history but what's even more incredible is that it does nothing special; instead, it relies largely upon classic, tried-and-true e-mail infection methods dating back at least four years.
Analyst Jon Oltsik writes that MyDoom virus sounded the alarm about the new business reality and the precariuos state of enterprise security.
The Bagle computer virus has almost finished off the alphabet. Virus writers' penchant for modifying the source code for the program has resulted in four new variants--Bagle.Q, Bagle.R, Bagle.S and Bagle.T--in the past two days, antivirus firms said on Thursday.
Increasingly, attackers are using better tools to find vulnerabilities quickly, exploit flaws and hide their attacks.
Viruses like MyDoom spread more quickly than warm butter on toast. Why?
Microsoft Exchange might be the most popular mail server but is it the best? We test the alternatives.
The only way to prevent future outbreaks is for us all to work together. Here's why.
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The cash-strapped UK National Museum of Computing is home to an exhibition of the evolution of British PCs.… Watch it now
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