Proofpoint Research has released findings of a new variant of the Buer malware loader distributed via emails masquerading as shipping notices. The new strain is rewritten in a coding language called Rust. Key findings include: malware written in Rust enables the threat actor to better evade existing Buer detection capabilities, as well as Proofpoint observing RustyBuer campaigns delivering Cobalt Strike Beacon as a second-stage payload in some campaigns. Saumitra Das of Blue Hexagon offers perspective.
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