We recently came across evidence of a large-scale cybercrime activity that appears to combine targeted attack tools and regular cybercrime: The attackers distribute typical malware such as cryptocurrency miners and ransomware by making use of sophisticated tools that were previously mostly seen in targeted attacks.
Read More We found cryptocurrency-mining activity that involves the exploitation of the Oracle WebLogic server vulnerability CVE-2019-2725 with the interesting behavior of using certificate files as an obfuscation tactic.
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We discovered a Docker Hub repository that has been sending infected cryptocurrency-mining containers to hubs with publicly exposed APIs. Some of the images within the repository contained a Shodan script that identified potential targets for further distribution.
Read More We detected mining activity on our honeypot that involves the search engine Elasticsearch, which is a Java-developed search engine based on the Lucene library and released as open-source. The attack was deployed by taking advantage of known vulnerabilities CVE-2015-1427, a vulnerability in its Groovy scripting engine that allows remote attackers to execute arbitrary shell commands through a crafted script, and CVE-2014-3120, a vulnerability in the default configuration of Elasticsearch.
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The concept of a stealthy, difficult-to-detect malware operating behind the scenes has proven to be an irresistible proposition for many threat actors, and they’re evidently adding even more techniques, as seen in a cryptocurrency miner (detected as Coinminer.Win32.MALXMR.TIAOODAM) we discovered that uses multiple obfuscation and packing as part of its routine.
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