Microsoft leads attack on ZeroAccess botnet

12/05/2013 - 05:00 PM

  • Microsoft leads attack on ZeroAccess botnet
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5th December 2013

On 5 December 2013, Microsoft announced that its Digital Crimes Unit has disrupted the ZeroAccess Botnet, the world's largest and most rampant botnet. ZeroAccess, also known as Sirefef, is made up of over 9 million zombies, which are coordinated to carry out click fraud activities to the banner ads distributed by the major search engines (Google, Yahoo and Bing) and are used to collect bitcoins, the well-known anonymous virtual currency. According to reports, Microsoft, in collaboration with the European Cybercrime Centre (EC3), Europol and the FBI was able to block communication towards 18 IPs and 49 domains used by bots to carry out click fraud campaigns. This has allowed the main source of income of these criminals to be neutralized and represents the largest attack ever launched against this botnet. In any case, it must be remembered that the botnet uses a peer-to-peer protocol and therefore has not been undermined in the least by this operation. At this point the criminals are expected to update their botnet, making it operational once again.