Mytob.c was the biggest worm threat in July, accounting for more than a quarter of all attacks, threat rankings from security experts Kaspersky Lab have revealed.
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Kaspersky’s Online Scanner Top Twenty for the month showed Mytob.c holding the top spot, but Kaspersky pointed to “noticeable outbreaks” caused by the unexpected return of Nyxem.e.
In its Top Twenty report, Kaspersky noted that Nyxem.e made up almost 17% of the malicious code detected in emails in June – and increased its threat, accounting for 24.24% of that found in July.
Other variants of Mytob also appeared prominently in the Kaspersky ranking.
Kaspersky offered good news for security professionals, suggesting that “this year the risk of an August epidemic is probably minimal”, despite major August worm outbreaks in the last three years, .
The report noted: “The last significant epidemic was caused by Nyxem.e in January this year. The only malicious programs which might be able to cause a serious outbreak, such as Scano or Bagle, are only showing brief flashes of activity.”
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