New Malware Found Lurking In 64-Bit Linux Installs

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New malware found lurking in 64-bit Linux installs.

A Linux backdoor recently discovered by researchers has avoided VirusTotal detection since 2018.

New malware found lurking in 64-bit Linux installs.

Dubbed RotaJakiro, the Linux malware has been described by the Qihoo 360 Netlab team as a backdoor targeting Linux 64-bit systems.

RotaJakiro was first detected on March 25 when a Netlab distributed denial-of-service (DDoS) botnet C2 command tracking system, BotMon, flagged a suspicious file.

At the time of discovery, there were no malware detections on VirusTotal for the file, despite four samples having been uploaded -- two in 2018, one in 2020, and another in 2021.

Netlab researchers say the Linux malware changes its use of encryption to fly under the radar, including ZLIB compression and combinations of AES, XOR, and key rotation during its activities, such as the obfuscation of command-and-control (C2) server communication.

At present, the team says that they do not know the malware's "true purpose" beyond a focus on compromising Linux systems.

There are 12 functions in total including exfiltrating and stealing data, file and plugin management -- including query/download/delete -- and reporting device information.

However, the team cites a "lack of visibility" into the plugins that is preventing a more thorough examination of the malware's overall capabilities.

In addition, RotaJakiro will treat root and non-root users on compromised systems differently and will change its persistence methods depending on which accounts exist.

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