Threat Actors Abuse Microsoft Help Index File to Execute PipeMagic Malware

Cybersecurity researchers have uncovered a sophisticated malware campaign exploiting Microsoft Help Index Files (.mshi) to deliver the notorious PipeMagic backdoor, marking a significant evolution in the threat actors’ tactics since the malware’s first detection in 2022. The campaign, which has targeted organizations across Saudi Arabia and Brazil throughout 2025, demonstrates the attackers’ continued refinement of […]

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