Security Researchers Discover the Mother of All Botnets

A new strain of the TDSS malware has been pegged as "the most sophisticated threat" to computer security in the world today by a Kaspersky Labs researcher and is being used to slave more than 4.5 million PCs in a massive botnet that's equipped with an "anti-virus" to prevent other bot-creating viruses from taking it over.

"TDSS uses a range of methods to evade signature, heuristic, and proactive detection, and uses encryption to facilitate communication between its bots and the botnet command and control center," security expert Sergey Golovanov writes this week a research note in on the SecureList site.

Botnets are networks of malware-infected computers that can be commanded by cybercriminals and hacktivists to conduct such activities as delivering spam, launching distributed denial-of-service attacks to bring down targeted websites, manipulating search results and adware, and facilitating network intrusions to steal sensitive data.

Sophisticated bot-creating programs like TDSS, which according to Golovanov has been under development since 2008 and is now in its fourth version (TDL-4), can harness a portion of the computing power of each system it infects, leaving owners of infected computers with somewhat slower machines but none the wiser as to their participation in a botnet.

There a few distinctive improvements in TDL-4 over previous TDSS generations, the Kaspersky Labs researcher writes. One is that the latest edition of TDSS includes a kind of "anti-virus" that scans a slave bot's registry for malicious programs that could interfere with a slaved computer's efficiency or even try to take over the computer to make it part of a rival botnet.

"TDSS contains code to remove approximately 20 malicious programs, including Gbot, ZeuS, Clishmic, Optima, etc.," Golovanov writes. "TDSS scans the registry, searches for specific file names, blacklists the addresses of the command and control centers of other botnets and prevents victim machines from contacting them.

"This 'antivirus' actually helps TDSS; on the one hand, it fights cybercrime competition, while on the other hand it protects TDSS and associated malware against undesirable interactions that could be caused by other malware on the infected machine."

Another advance for TDL-4 is the extent to which it burrows into infected systems, making the botnets it creates "indestructible," according to the researcher. Other improvements over the previous TDL-3 generation of TDSS malware include the encryption of communications between a botnet operator's command-and-control servers and the botnet, and the ability to transmit commands to a botnet over the publicly accessible, peer-to-peer Kad network via TDL-4's kad.dll module.

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Security Researchers Discover the Mother of All Botnets

"TDSS contains code to remove approximately 20 malicious programs, including Gbot, ZeuS, Clishmic, Optima, etc.," Golovanov writes. "TDSS scans the registry, searches for specific file names, blacklists the addresses of the command and control centers



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AdWare.Win32.Virtumonde.imw infection is one of the most common dilemmas of computer users these days.Are you also a victim of AdWare.Win32.Virtumonde.imw? It’s important to remove AdWare.Win32.Virtumonde.imw in your computer before they do some damage to its system.

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Google and yahoo searches are redirected to the malicious website.

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