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New ‘Shikitega’ Linux Malware Grabs Full Management of Contaminated Methods

By Ionut Arghire on September 08, 2022

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Safety researchers with AT&T Alien Labs are warning of a brand new piece of malware that may take full management of contaminated Linux programs, together with Web of Issues (IoT) gadgets.

Dubbed Shikitega, the risk is delivered as a part of a multi-stage an infection chain, the place every step is liable for part of the payload and fetches and executes the following module.

To make sure it will probably achieve full management over an contaminated system, the malware downloads and executes Metasploit’s ‘Mettle’ meterpreter. It additionally makes an attempt to take advantage of system vulnerabilities to escalate privileges and obtain persistence.

Shikitega hosts a few of its command and management (C&C) servers on professional cloud providers, makes use of a polymorphic encoder to evade detection, and deploys a cryptocurrency miner on the contaminated machines.

With the assistance of Mettle, the attackers can execute assaults resembling webcam controls, sniffers, varied reverse shells, shell instructions, course of controls, and extra.

AT&T Alien Labs additionally noticed the malware utilizing wget to fetch and run a subsequent stage dropper. Shell instructions are used to obtain and execute extra payloads.

Shikitega, the safety researchers say, exploits two identified Linux vulnerabilities – CVE-2021-4034 and CVE-2021-3493 – to fetch and execute the ultimate payload – a persistent cryptocurrency miner – with root privileges.

The researchers says the malware is utilizing 5 shell scripts to realize persistence. The risk units crontabs for the present person and for the person root – the malware first checks for the presence of crontab command on the machine and creates it if it doesn’t exist.

The malware deploys XMRig (a well-liked miner for Monero) as its remaining payload and units a persistence crontab for downloading and executing the miner.

To mitigate the danger of an infection, AT&T Alien Labs recommends the elemental protections of putting in safety patches in a well timed method, protecting server backups, and utilizing anti-malware software program on all endpoints.

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