New TamperedChef Malware Exploits Productivity Tools to Access and Exfiltrate Sensitive Data

A sophisticated malware campaign dubbed “TamperedChef” is exploiting trojanized productivity tools—disguised as seemingly benign applications—to bypass security controls, establish persistence, and siphon sensitive information from targeted systems. On September 22, 2025, Field Effect researchers investigating a potentially unwanted application (PUA) flagged by Microsoft Defender uncovered two malicious applications—ImageLooker.exe and Calendaromatic.exe—delivered via self-extracting 7-Zip archives. Both […]

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