MFA Doesn’t Protect You — Cookies Give You Away: The Rise of Session Hijacking

**Executive summary:** Session hijacking via stolen browser cookies is presented as a rapidly growing, high-impact threat that bypasses MFA; infostealer families, AiTM phishing, XSS, and malicious extensions are shown to harvest session tokens at scale, which are then sold on underground markets and used to mount large breaches and supply-chain attacks (notably EA and the Snowflake campaign). The report recommends layered defenses including HttpOnly/Secure cookie flags, short session lifetimes, token binding/rotation, endpoint/extension controls, behavioral detection (impossible travel, IP/user-agent anomalies), and dark‑web monitoring to detect exposed tokens before exploitation.