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September malware chart from Sunbelt Software

Sunbelt Software : 06 October, 2009  (Technical Article)
Scareware downloaders feature strongly in September's malware list with spy Trojan still in top position after 6 months of continuous dominance
September malware chart from Sunbelt Software
Sunbelt Software, the provider of Windows security software, has announced the top 10 most prevalent malware threats for the month of September 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 SunbeltLabs.

For September, SunbeltLabs reports the password-stealing Trojan threat Trojan-Spy.Win32.Zbot.gen maintained the top spot on the list for the sixth consecutive month, but its prevalence decreased by 12 percent month over month, to 6.75 percent of overall Sunbelt detections from 7.67 percent in August.

"In general, the top 10 list of Sunbelt Software's detections for September shows a month with a lot of Trojans circulating, mostly aimed at getting users to download rogue security products," said Sunbelt Software's Vice President of Threat Research Michael St. Neitzel. "Zbot continues to be a top detection due to its effective versatility in stealing cached passwords, login credentials and data in certificates and cookies."

Not surprisingly, a widely circulating rogue security product, FraudTool.Win32.Antivirus2010 (v), made the list again, still at the number three spot. The Vipre detected Trojan.Win32.Tdss.aalc (v) fell off the list entirely after comprising 3.62 percent of malware in August. In its place, another threat made it onto the list: Packed.Win32.TDSS.y, at number nine.

The top 10 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.

Whilst in August, Trojan.Win32.Generic!BT, a downloader associated with rogue security programs (also called "scareware") made up 7.57 percent of detected malware, in September it was no longer useful to track on the top 10 list due to the generic nature of the detection category. That name was used to classify a vast number of files associated with downloader functions found by Sunbelt's MX-Virtualization, a compact, high-speed virtualised Windows environment integrated directly into VIPRE, which performs rapid behavioural analysis of potential malware by observing its behaviour in a virtual environment.

The top 10 most prevalent malware threats for the month of September are:

1. Trojan-Spy.Win32.Zbot.gen 6.75%
2. Trojan.Win32.Malware 5.47%
3. FraudTool.Win32.Antivirus2010 (v) 2.76%
4. Explorer32.Hijacker 2.34%
5. Trojan-Downloader.braviax 2.12%
6. Trojan.DNSChanger.Gen 1.77%
7. Trojan-Downloader.Zlob.Media-Codec 1.70%
8. Exploit.PDF-JS.Gen (v) 1.57%
9. Packed.Win32.TDSS.y 1.55%
10. BehavesLike.Win32.Malware (v) 1.55%

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