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Tracking TamperedChef Clusters via Certificate and Code Reuse

ID: 9115c56b-1134-527a-b86a-c082ce071746

STIX ID: report--9115c56b-1134-527a-b86a-c082ce071746

Feed Name: Palo Alto Networks Unit 42

Threat Score
75/100

Date Published: 2026-05-20

Date Updated: 2026-05-20

Author: Joseph Ganter

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Executive summary: This report documents 'TamperedChef'-style campaigns—trojanized productivity applications distributed via malvertising and search ads—that use legitimate-looking sites and code-signing to evade detection, remain dormant for weeks, then retrieve and execute second-stage payloads including information stealers, RATs and proxy tooling; analysts mapped three clusters (CL-CRI-1089, CL-UNK-1090, CL-UNK-1110), thousands of samples and many code-signing entities, and provide detection, mitigation and IoCs.

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