Hackers using stealthy Linux backdoor Symbiote to steal credentials

Researchers have come across a stealthy Linux backdoor that uses sophisticated techniques to hide itself on compromised servers and steal credentials. Dubbed Symbiote because it injects itself into existing processes, the threat has been in development since at least November 2021 and seems to have been used against the financial sector in Latin America.

“Symbiote is a malware that is highly evasive,” researchers from BlackBerry said in a new report. “Since the malware operates as a userland level rootkit, detecting an infection may be difficult. Network telemetry can be used to detect anomalous DNS requests and security tools such as AVs and EDRs should be statically linked to ensure they are not “infected” by userland rootkits.”

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