Top 10 Trojans from Recent Malware Detections

In December 2009 and January 2010, Trojans made up six of the top 10 malware detections for security researchers.

A malicious Trojan virus has shot to the number one spot on a malware detection list recently. Trojan.Win32.Generic!BT, which is a generic detection for Trojans that comprised nearly one quarter (23.15 percent) of all the malware found, remained in the top position for the third month in a row, growing by nearly 20 percent from 18.69 percent of all detections in December. It is a detection that includes many downloaders associated with scareware or rogue security products.

The password-stealing Trojan-Spy.Win32.Zbot.gen, which held the top spot on the list for most of 2009, is now in second position on the list, decreasing to 4.91 from 6.23 percent of all threat detections.

Other Trojans in the top 10 include:

• Trojan.Win32.Generic!SB.0
• Trojan.Win32.Malware
• Trojan.ASF.Wimad
• Trojan.HTML.FakeAlert.a

Meanwhile, two new detections have moved onto February's top 10 list. Virtumonde, a general description of an adware program with many versions of pop up advertising, constituted 1.23 percent of overall detections. Packed.Win32.TDSS.aa, a sophisticated rootkit and Trojan that is used primarily to redirect search engine results, made up 1.21 percent. These threats are classified as moderate to severe based on method of installation among other criteria established by computer security experts. The majority of these threats propagate through stealth installations or social engineering.

The top 10 most prevalent malware threats for the month of January 2010 with the percentage it accounts for.

1. Trojan.Win32.Generic!BT 23.15%
2. Trojan-Spy.Win32.Zbot.gen 4.91%
3. Exploit.PDF-JS.Gen 4.55%
4. Trojan.Win32.Generic!SB.0 2.40%
5. Trojan.Win32.Malware 1.93%
6. Trojan.ASF.Wimad 1.92%
7. INF.Autorun 1.46%
8. Virtumonde 1.23%
9. Packed.Win32.TDSS.aa.3 1.21%
10. Trojan.HTML.FakeAlert.a 0.98%

Have you had the unfortunate situation where you encountered one of these Trojan parasites? If so, were you able to remove it?