Detecting and Mitigating NTLM Relay Attacks Targeting Microsoft Domain Controllers

Originally published by CrowdStrike here. Written by Marina Simakov, CrowdStrike. Adversaries often exploit legacy protocols like Windows NTLM that unfortunately remain widely deployed despite known vulnerabilities. The PetitPotam vulnerability, combined with AD-CS relay, is one of the recent severe NTLM relay variations the CrowdStrike researchers have seen, which indicates its high popularity. While the latest Microsoft security update — released on Patch Tuesday, May 10, 2022 — included a ...

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