Why Your MFA Is Not Enough: The Session Hijacking Threat

MFA is the standard for securing accounts, but attackers have adapted. The rise of "Pass-the-Cookie" attacks allows threat actors to bypass MFA entirely by stealing a valid session token.

How It Works

When you log in with MFA, the server issues a session cookie. If an info-stealer malware is running on your device, it grabs this cookie and sends it to the attacker. The attacker imports the cookie into their browser and is instantly logged in as you—no password or MFA code required.

Defending Against Hijacking

To defend against this, organizations need to move beyond simple MFA. Strategies include:

• Device Trust: Ensure requests come from managed, healthy devices.
• Token Binding: Bind session tokens to specific hardware or network properties.
• Session Monitoring: Detect anomalies in session usage, such as impossible travel or changing user agents.

DarkLake helps by alerting you when valid session tokens for your users appear in stealer logs, allowing you to invalidate them before they are abused.