Millenium RAT Browser Credential Theft via Login Data and Cookie Access

Ibrahim Saud@tektrix

•updated Jun 30, 2026•0•0•2

Detects unauthorized non-browser processes attempting to access sensitive credential and session cookie files associated with major web browsers such as Chrome, Edge, and Firefox. This behavior is indicative of credential harvesting techniques often utilized by infostealer malware, including variants of the Millenium RAT, to extract stored passwords and session tokens.