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Security Operations · Intermediate

Infostealer

Malware designed to harvest credentials, browser cookies, crypto wallets and other sensitive data from infected systems.

Definition

Infostealers such as RedLine, Raccoon and Lumma collect saved passwords, session cookies, autofill data and system information, then upload them as "logs" sold on underground markets. Stolen session cookies can bypass MFA via session hijacking. They are a major source of initial access for later breaches.

Example

An employee installs a cracked game that steals saved browser passwords and an Okta session cookie.

Exam tip

Stolen session tokens bypass MFA; response should include revoking sessions, not just resetting passwords.

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