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ValleyRAT campaign operators are an intrusion cluster associated with job-lure malware delivery using trojanized software and DLL side-loading. The activity uses archive-based lures themed as employment or application materials and presents victims with decoy job-related content while malware is installed in the background. A documented tradecraft element is the use of a weaponized Foxit PDF Reader to execute the infection chain and conceal malicious activity behind a plausible user-facing document experience. Based on the available facts, the operators’ observed behavior supports initial access through social engineering and malware execution with defense-evasion via DLL side-loading. Attribution to a specific named intrusion set or nation-state sponsor is not currently available from the supplied facts.
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Every observed MITRE ATT&CK technique, grouped by tactic.
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