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The Kelihos botnet, also known as Hlux, is a botnet mainly involved in the theft of bitcoins and spamming. == History == The Kelihos botnet was first discovered around . Researchers originally suspected having found a new version of either the Storm or Waledac botnet, due to similarities in the modus operandi and source code of the bot, but analysis of the botnet showed it was instead a new, 45,000-infected-computer-strong, botnet that was capable of sending an estimated spam messages a day. In Microsoft took down the botnet in an operation codenamed "Operation b79".〔 At the same time, Microsoft filed civil charges against Dominique Alexander Piatti, dotFREE Group SRO and 22 John Doe defendants for suspected involvement in the botnet for issuing 3,700 subdomains that were used by the botnet.〔 These charges were later dropped when Microsoft determined that the named defendants did not intentionally aid the botnet controllers. In January 2012 a new version of the botnet was discovered, one sometimes referred to as Kelihos.b or Version 2,〔〔〔 consisting of an estimated 110,000 infected computers.〔 During this same month Microsoft pressed charges against Russian citizen Andrey Sabelnikov, a former IT security professional, for being the alleged creator of the Kelihos Botnet sourcecode.〔 The second version of the botnet itself was shut down by it in by several privately owned firms by sinkholing it – a technique which gave the companies control over the botnet while cutting off the original controllers.〔 Following the shutdown of the second version of the botnet, a new version surfaced as early as 2 April, though there is some disagreement between research groups whether the botnet is simply the remnants of the disabled Version 2 botnet, or a new version altogether. This version of the botnet currently consists of an estimated 70,000 infected computers. The Kelihos.c version mostly infects computers through Facebook by sending users of the website malicious download links. Once clicked, a Trojan horse named Fifesoc is downloaded, which turns the computer into a zombie, which is part of the botnet. On 24 November 2015 a Kelihos botnet event occurred causing widespread false positives of blacklisted IPs: ″November 24, 2015 Widespread false positives Earlier today, a very large scale Kelihos botnet event occurred - by large scale, many email installations will be seeing in excess of 20% kelihos spam, and some will see their inbound email volume jump by a volume of as much as 500%. This isn't an unusual thing normally, the CBL/XBL has been successfully dealing with large scale Kelihos spam spikes like this, often daily, for years. The email was allegedly from the US Federal Reserve, saying something about restrictions in "U.S. Federal Wire and ACH online payments." Not only was the notice itself fraudulent, the attached Excel spreadsheet (.xls) contained macro instructions (a downloader) to download a Windows executable virus, most likely Dyreza or Dridex malware. The detection rules initially deployed by the CBL unfortunately were insufficiently detailed, and listed a number of IP addresses in error.″ 〔http://www.abuseat.org〕 抄文引用元・出典: フリー百科事典『 ウィキペディア（Wikipedia）』 ■ウィキペディアで「Kelihos botnet」の詳細全文を読む スポンサード リンク
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