Valid Account Credential Abuse: Exploiting the Weakest Link

ReliaQuest warns that widespread reuse of corporate credentials and exposed account data (from breaches, infostealers, and brokered lists) creates a persistent risk of valid account compromise, enabling attackers to evade detection, move laterally, steal or encrypt data, and disrupt operations; the report outlines detection and mitigation steps (dark-web monitoring via GreyMatter, MFA, conditional access, password hygiene, and credential blocking).