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New Trojans Appear In July's Top Ten Malware List

Sunbelt Software : 05 August, 2010  (Technical Article)
Sunbelt Software's top 10 malware threat list for July has been published with Trojans and the Conficker worm being high on the table of threats which bombarded users during the month
New Trojans Appear In July's Top Ten Malware List
Sunbelt Software, now part of the GFI Software family, has announced the top 10 most prevalent malware threats for the month of July 2010. The report, compiled from monthly scans performed by Sunbelt Software's award-winning anti-malware solution, Vipre Antivirus, and its antispyware tool, CounterSpy, is a service of SunbeltLabs.

Sunbelt Software ThreatNet statistics for the month of July show that users were under attack throughout the month primarily by Trojans and the Downad/Conficker worm. Trojans detected as Trojan.Win32.Generic!BT were the chief detection with almost a third (29.08 percent) of the total. This particular Trojan detection has been in the top spot for some time: in June with 27.16 percent and in May with 27.79 percent of the total detections.

Two other widespread detections made it into the top-10: Trojan.Win32.Meredrop, with 1.01 percent of detections and Trojan.Win32.Generic!SB.0 (0.92 percent). Trojan.Win32.Malware.a (0.84 percent) returned to the top-10 after a one month hiatus.

Trojan.Win32.Meredrop is a generic detection for a number of Trojans that install and run a variety of malware on a victim's machine. They are usually packed and may contain multiple Trojans, backdoors and worms. Trojan.Win32.Generic!SB.0 is a generic detection for password-stealing Trojan horse programs that install keyloggers. Trojan.Win32.Malware.a is a detection for a variety of malicious code.

"Trojan.Win32.Generic!BT is a generic risk that covers a lot of malicious applications. About 120,000 traces are identified under that detection by VIPRE's signature-based, heuristic or behavioural mechanisms," said Francis Montesino, manager of Sunbelt Software's malware processing team. "Very often it identifies the downloaders that are used with rogue security programs, also called 'scareware.' Once they get downloaded, the rogues pretend to scan your computer for malware then display false warnings that the machine is infected. They try to convince victims to purchase useless security software, that often contains more threats."

The top 10 results represent the number of times a particular malware infection was detected during VIPRE and CounterSpy scans that report back to ThreatNet, Sunbelt Software's community of opt-in users. These threats are classified as moderate to severe based on method of installation among other criteria established by SunbeltLabs. The majority of these threats propagate through stealth installations or social engineering.

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

1 Trojan.Win32.Generic!BT 29.08%
2 Trojan-Spy.Win32.Zbot.gen 4.17%
3 Trojan.Win32.Generic.pak!cobra 3.29%
4 INF.Autorun (v) 2.93%
5 BehavesLike.Win32.Malware (v) 1.23%
6 Worm.Win32.Downad.Gen (v) 1.05%
7 Trojan.Win32.Meredrop 1.01%
8 Trojan.Win32.Generic!SB.0 0.92%
9 Trojan.ASF.Wimad (v) 0.85%
10 Trojan.Win32.Malware.a 0.84%
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