Online Security

Researchers Uncover Stealthy Linux Malware That Went Undetected for 3 Years

A previously undocumented Linux malware with backdoor capabilities has managed to stay under the radar for about three years, allowing the threat actor behind the operation to harvest and exfiltrate sensitive information from infected systems.

Dubbed “RotaJakiro” by researchers from Qihoo 360 NETLAB, the backdoor targets Linux X64 machines, and is so named after the fact that “the family uses rotate encryption and behaves differently for root/non-root accounts when executing.”

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The findings come from an analysis of a malware sample it detected on March 25, although early versions appear to have been uploaded to VirusTotal as early as May 2018. A total of four samples have been found to date on the database, all of which remain undetected by most anti-malware engines. As of writing, only seven security vendors flag the latest version of the malware as malicious.

“At the functional level, RotaJakiro first determines whether the user is root or non-root at run time, with different execution policies for different accounts, then decrypts the relevant sensitive resources using AES& ROTATE for subsequent persistence, process guarding and single instance use, and finally establishes…

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