Poorly managed Linux servers are an easy opportunity for threat actors to deploy malware, so patch up.
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Also see https://asec.ahnlab.com/en/54647/ which links to Ahnlabs more technical description. Seems like it breaks in by guessing passwords and trying to log in via SSH.
Wow, literally just a dictionary attack… what a let-down!
Sad that this article contains almost no information other than “malware attacks your ssh”. Well… I guess I better buy their firewall if they’re not telling me what to fix.