Best Detection of 2026 Series: Infostealer Session Theft (Lumma/Vidar)
Detects potential browser-based infostealer activity where a non-standard process, launched from temporary or user-download directories, accesses sensitive browser data files (cookies, login data) followed by a suspicious outbound network connection to a previously unseen domain, matching common patterns for LummaStealer or Vidar malware.
Microsoft Sentinel (KQL)
