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How do attackers use infostealer logs to gain access?

Stolen infostealer logs give attackers everything they need to impersonate real users — without logging in, triggering MFA, or raising alerts. These access methods vary in technique, but all exploit existing trust.

  • Session hijacking — attackers take over active sessions using stolen cookies, bypassing authentication

  • Token replay attacks — stolen tokens are reused to initiate new sessions via API or browser injection

  • Password-based logins — many logs contain credentials for systems without MFA or with fallback logins

Once inside, attackers often:

  • Abuse trust to escalate — sending internal messages or requests to trick others, reset credentials, or gain deeper access

  • Move laterally — using internal integrations or single sign-on to navigate between systems

Because attackers use valid sessions or credentials, access looks legitimate — and often bypasses detection entirely.

Working with Passguard is easier than you think. Discover how we help organizations manage their infostealer risk in just 3 steps.