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'CryptoSink' Security Scare

Submitted by Roy Schestowitz on Sunday 17th of March 2019 04:12:32 AM Filed under
Security
  • Cryptojacking Takes a New Turn in CryptoSink Campaign

    Researchers from F5 Labs reported on March 14 that they have discovered a new cryptojacking campaign that is abusing unpatched Elasticsearch servers.

    Unauthorized cryptocurrency mining, commonly referred to as "cryptojacking," is an attack trend that started in 2017 and hit a peak in mid-2018. With a cryptojacking attack, a hacker makes use of a system or server resources to help mine cryptocurrency. F5 Labs is dubbing the cryptojacking campaign it discovered "CryptoSink" as the attackers are identifying systems that have already been compromised by cryptojacking and are "sinkholing" or redirecting the competitive mining effort. When the competitive cryptojacking effort is sinkholed, it is effectively shut down in favor of the new CryptoSink effort.

  • New cryptominer targets Elasticsearch on Windows, Linux

    A new cryptomining campaign that targets both Windows and Linux systems running the Elasticsearch search and analytics engine has been detailed by researchers from F5 Networks.
    Andrey Shalnev and Maxim Zavodchik said in a blog post that the campaign, which they have named Cryptosink, was using a five-year-old vulnerability in Elasticsearch to gain entry to the servers.

    The initial infection vector was a malicious HTTP request that targeted Elasticsearch.

    [...]

    The malware was also able to backdoor the server by adding the SSH keys of the person who was carrying out the attack.

    And it used several command and control servers, with the current live one being in China.

    Shalnev and Zavodchik said the rise of cryptomining botnets and the decline in crypto currency value meant there was tough competition among the various currencies.

»

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