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Trojan.Clicker.CM Continues to Top Bitdefender’s List of E-Threats

Internet security firm BitDefender has released its list of top ten online threats for October 2009 in the first week of November 2009.

The top slot is once again acquired by Trojan.Clicker.CM which is often there on sites which hosts unauthentic applications like serial numbers, cracks and keygens for famous commercial software applications. It is usually used to force ads inside the browser and contains 9.47% of infected files in October 2009.

With 8.54% of the global infections, Trojan.AutorunInf.Gen, which stands second in the list, is a general technique used to distribute malware through detachable devices like memory cards, flash drives or external hard-disk drives.

Win32.Worm.Downadup is at the third place with 5.29% of the overall volume of infected systems. Popularly known as Conficker and Kido, this worm propagates by exploiting vulnerability in the RPC Server Service of Windows.

With 4.90% of the worldwide infections, Trojan.Wimad ranks fourth. This Trojan masquerades itself as a legit multimedia file, created to attack the system and install malware files from isolated servers by using exploits in Windows DRM technology. The Trojan propagates through uncertain shareware programs and p2p, multimedia spam e-mails or through adult content sites.

Exploit.PDF-JS.Gen is at the fifth position with 4.84% of the global infections. This Trojan exploits security loopholes discovered in PDF documents to download spyware onto user's system.

A rootkit-installing file infector, Win32.Sality.OG occupies the sixth place at 2.31% of the infections stimulated worldwide.

The seventh place belongs to Trojan.Autorun.AET at 2.20% of total infections. It is a part of malware that circulates through the shared folders of Windows and through detachable media (network attached storage devices or mapped devices). This Trojan abuses the Autorun feature executed in Windows operating system to run itself automatically when an infected device is plugged in.

Worm.Autorun.VHG, Trojan.Swizzor.6, Gen:Adware.Heur.wq0@j4oukhei acquire eighth, ninth and tenth positions respectively, with infection rates of 1.49%, 1.22%, and 1.21%.

Lastly, on comparing BitDefender's September and October 2009 top ten e-threats, a radical change is seen. In September 2009 report, first three positions were acquired by trojans and they were responsible for 25% of overall infections.

Related article: Trojans to Target VoIP in 2006

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