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Top 10 malware threats for July

Sunbelt Software : 06 August, 2009  (Technical Article)
Sunbelt Software reports on the most prevalent malware threats detected during July
Sunbelt Software has announced the top ten most prevalent malware threats for the month of July 2009. The report, compiled from monthly scans performed by Sunbelt's award-winning antispyware tool, CounterSpy, and its anti-malware solution, Vipre Antivirus + Antispyware, is a service of SunbeltLabsâ„¢.

For July, SunbeltLabs reports the second-highest detected malware threat as a DNSChanger variant, Trojan.Win32.Tdss.aalc (v), a detection for a group of Trojans that uses downloaders for rogue anti-malware applications to drop malicious code on users' PCs. The installed software code then contacts malicious Web sites and downloads further malware.

The TDSS Trojans are packed and can contain a number of pieces of malware, including Trojans, backdoors and worms; and is a variant of the two-year-old threat, Trojan.DNSChanger.Gen. Trojan.DNSChanger.Gen uses rootkit technology to change Windows DNS settings on compromised computers in order to inject malicious content into otherwise legitimate Web pages or redirect search engine results in popular search engines, often referred to as click fraud hijacking.

There has been a substantial decrease in the number of infections for the top threat, Trojan-Spy.Win32.Zbot.gen from June to July, down 38% from 7.99% to 4.99% of total threats seen.

The top ten results represent the number of times a particular malware infection was detected during CounterSpy and VIPRE scans that report back to Sunbelt's community of opt-in users.

The top ten most prevalent spyware threats for the month of July are:

Trojan-Spy.Win32.Zbot.gen 4.99%
Trojan.Win32.Tdss.aalc (v) 2.92%
Win32-Trojan-gen {Other} 2.23%
Trojan.1 2.11%
Trojan.DNSChanger.Gen 1.66%
Trojan-Downloader.Zlob.Media-Codec 1.58%
Exploit.PDF-JS.Gen (v) 1.50%
BehavesLike.Win32.Malware (v) 1.49%
Explorer32.Hijacker 1.32%
Trojan.Fakeavalert 1.20%
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