Suspicious Access to Microsoft Teams Authentication Tokens
Detects suspicious access to Microsoft Teams application's authentication tokens and local storage, which may contain sensitive credentials. This rule specifically looks for Event ID 4663 (Object Access) where the accessed object path contains '\Microsoft\Teams\Cookies' or '\Microsoft\Teams\Local Storage\leveldb', and the accessing process is NOT the legitimate 'Teams.exe'. This indicates an attempt by an unauthorized process to steal Teams authentication tokens.
Sigma
