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botnet

  1. Spam Levels Holding Steady Despite Botnet Takedown

    You cannot stop spam email; you can only hope to contain it. Frankly, even hoping for that is probably a little bit of wishful thinking. It's been just more than a month since the much ballyhooed takedown of the Grum botnet, a network of infected computers was estimated to be responsible for about one sixth all the cheap Viagra ads you have ever seen. (It's not just me getting those, right guys? Right?) So what affect has the takedown of one of the biggest spam delivery systems in the history of the web had on the amount of spam that actually hits your inbox? Absolutely none, it would seem.

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  2. Inboxes Rejoice: Botnet Behind 18% of Spam Taken Down

    The Grum botnet has been one of the most prominent distributors of spam for years, ranking third in terms of world spam volume. Yesterday, network security corporation FireEye reported that all of Grum's command and control servers (or CnC's) had been taken down after a weeks-long effort. Thanks to the work of a number of individuals who contributed to the takedown, we may see a significant decrease in the volume of the world's spam in the coming months.

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  3. Mac Botnet Has Infected Over Half a Million Computers

    For some, one of the reasons to get a Macintosh computer was that there were few nasty viruses or other malicious junk floating around that could affect your machine. However, this kind of attitude can only lead to trouble and now the Russian security company Doctor Web says that one particular trojan called Backdoor.Flashback.39 has infected over 550,000 Apple computers.

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  4. Botnets: The Stealthy Online Threat [Infographic]

    When it comes to cybersecurity threats, there are none that I find more terrifying than the botnet. We've written about that them before, but for the uninitiated: A botnet is a horde of computers that are under the control of ne'er-do-wells, often times with the owner's knowledge. Infected computers are used for all kinds of nefarious activities, like sending spam, being used in DDOS attacks, or sometimes just to swipe financial information. This infographic gives a solid explanation of how these networks of zombie computers operate and, more importantly, how to protect yourself. In between are some shocking statistics that may just spread my fear of botnets to all of you. You're welcome.

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  5. FBI Hijacks, Remotely Disables “Coreflood” Botnet

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    In an unprecedented move, the FBI has seized control of a malicious botnet and remotely disabled the malicious software on infected computers. The botnet in question, called "Coreflood" allows its operators to harvest financial information from over 2 million infected machines for nearly a decade. The FBI's attack on the coreflood botnet began Tuesday, after receiving permission from the Department of Justice. In their request to the DOJ, the FBI sought to allow the Internet Systems Consortium to assist in the beheading and hijacking of the coreflood. Wired reports:
    According to the filing, ISC, under law enforcement supervision, planned to replace the servers with servers that it controlled, then collect the IP addresses of all infected machines communicating with the criminal servers, and send a remote “stop” command to infected machines to disable the Coreflood malware operating on them.
    Interestingly, Coreflood reactivates each time the infected computer reboots, meaning that the FBI must continue to broadcast its kill command. As part of a long-term solution, the FBI is using IP information to inform infected users and Microsoft included an update to its Malicious Software Removal tool to remove Coreflood. This is the first time that United States law enforcement has not only disabled a botnet, but broadcast information directly to private computers.

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