Session Cookie Theft: You Showed Your ID at the Door. But Someone Else Has Your Room Key

Session cookie theft lets attackers bypass MFA by stealing and replaying browser session tokens, allowing unauthenticated access without triggering a login or MFA prompt. Effective defenses include shortening and rotating session lifetimes, device binding, continuous context evaluation, step-up authentication, and strong endpoint controls. #infostealers #OneLogin

Keypoints

Session cookies act as post-login credentials and can be replayed if stolen.
Infostealer malware harvests browser session tokens without needing administrator privileges.
Stolen tokens bypass MFA because MFA only protects the initial login event.
Reduce risk by shortening session lifetimes, enabling session rotation, and using device binding and continuous evaluation.
Endpoint security and restricting access to managed devices help prevent the initial theft.