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Trojans and exploits dominated the malware landscape

Web-based e-threats continue to dominate during the first month of 2009, according to BitDefender’s Top Ten analysis. Leading the pack was Trojan.Clicker.CM with a share of 5.40 percent. This device displays a significant number of commercial pop-up windows in the background of the user’s Web browser in order to lure the user to click. The aim is to generate profits for advertisements registered within a pay-per-click system. To display the ads successfully, the Trojan uses several functions that bypass the Norton® Internet Security Pop-up Blocker.

Trojan Wimad.Gen.1 and Trojan.Downloader.Wimad.A succeeded in raising 6.88 percent in January, making them some of the most common e-threats in the wild. Part of a very large family, these Trojans are spread with the aid of a network of malicious websites. Usually distributed via e-mail spam campaigns as a 3.5 MB .wma attachment and bearing the name of some popular artists, the disguised Trojan automatically opens the Web browser in order to retrieve the “appropriate” codec, which is, in effect, another piece of adware – Adware.PlayMp3z.A.

As predicted by BitDefender’s E-Threat Landscape Report, the exploits increased their volume in the last month, holding no less than 4 positions and almost 12 percent in the current Top 10. For instance, Trojan.Exploit.SSX abuses vulnerable sites when a malicious SQL code is injected into their databases. The result is an invisible iFrame element that redirects the user to an infected Web site that attempts to download and install several malicious payloads.

Last but not least, autorun infectors and downloaders occupied the remaining positions, with another noteworthy comeback of Packer.Malware.NSAnti.1 with its 2.09 percent. This malware with worm functionality spreads via infected Web sites or through maliciously crafted autorun.inf files within removable devices. NSAnti corrupts Internet Explorer® behavior and steals user names and passwords for online games, such as Silkroad Online or Lineage.

“The beginning of 2009 showed two important trends,” said Head of BitDefender Antimalware Research, Sorin Dudea. “First, that Web-based distributed malware is still the most successful type of e-threat in the wild and secondly: that previous productive breeds are back with the same or even higher percentage. This confirms that the level of user awareness in terms of system security remains very low for defensive activities, such as patching the OS with the latest fixes, updating security suites or surfing the Web cautiously.”

BitDefender’s January 2009 Top 10 E-Threat list includes:

Pos. - Name - %

1. Trojan.Clicker.CM 5.40
2. Trojan.Wimad.Gen.1 4.32
3. Trojan.AutorunINF.Gen 4.22
4. Trojan.Downloader.Js.Agent.F 3.79
5. Trojan.Exploit.ANPI 3.59
6. Trojan.Exploit.SSX 3.36
7. Exploit.SinaDLoader.A 2.70
8. Trojan.Downloader.Wimad.A 2.56
9. Exploit.HTML.Agent.AO 2.30
10. Packer.Malware.NSAnti.1 2.09
Other malware 65.67

About BitDefender®

BitDefender is the creator of one of the industry's fastest and most effective lines of internationally certified security software. Since its inception in 2001, BitDefender has continued to raise the bar and set new standards in proactive threat prevention. Every day, BitDefender protects tens of millions of home and corporate users across the globe — giving them the peace of mind of knowing that their digital experiences will be secure. BitDefender solutions are distributed by a global network of value-added distribution and reseller partners in more than 100 countries worldwide. More information about BitDefender and its products are available at the company’s security solutions press room. Additionally, BitDefender’s provides background and the latest updates on security threats helping users stay informed in the everyday battle against malware. For More information see

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Contact details:

Mike Ottewell
PR for BitDefender UK & Ireland
Tel: 01538 750 538

Nick Billington
BitDefender Country Manager (UK and Ireland)

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