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Top Twenty Virus Chart Released for July

The Top Twenty viruses in July 2007 had some known names leading the list. It also comprised of not only the usual veterans but also some very original viruses.

Botnets were extremely active in the month. The Agent.bqs Trojan of the Warezov family distributed by the network of zombie PCs, occupied the top-most place in the list. It contributed about 22% of malicious code in total mail traffic.

Although the number of Warezov variants declined from 4 in June 2007 to one in July 2007, their threat still persists. For, more virus and spam mailings are likely to follow the high-ranking virus in July 2007 resulting in a new "Warezov madness" soon.

Of the veteran viruses, Netsky.q and .t have both come down by single positions, although their presence in total mail traffic in terms of percentage has remained the same as in June 2007 i.e. at 14% and 16% respectively. Bagle.gt too has slide down one position but was able to retain its position in top three malwares.

The situation overall remains stable despite the surge of Warezov.pk being first noticed on June 26, 2007 that spiked in the early days of July 2007. The conditions for new world epidemics are not supportive therefore, the primary threat comes from local attacks focusing on people in different countries.

There was some interchanging of positions by old worms in the top fifteen places of the July chart. Exploit.Win32.IMG-WMF.y swelled most significantly during July. One of the main grounds for this growth is that the second malware in ranking, the Womble.d mail virus, takes help of this exploit to spread. Viruslist published this observation.

Two other worms that are important to mention here are the LovGate.w and Scano.gen that reappeared in the Top Twenty list. However, these worms have low possibility of making a significant impact during the approaching months. Also worth mentioning is the re-entry of the Zhelatin.dam virus, which demonstrates that its family of variants are likely to stay for sometime.

Rest of the malware accounted for 8.12% of total traffic implying that a good amount of other trojans and worms are in circulation.

Related article: Top Law Enforcement Office Fails to Recognize A phishing E-Mail

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