Phishing Link Clicked: Immediate Containment Checklist

- User clicked a suspicious URL received by email or chat. - Unexpected credential prompt or MFA push appears after click. - Browser redirects to unknown domains or fake sign-in pages.

- Credential-harvesting or token-theft phishing campaign. - Malicious redirect site mimicking corporate sign-in flow. - User session/cookie capture attempt.

Document whether the issue affects one user, multiple users, or multiple devices. Confirm exact error messages, recent changes (password reset, update, network change), and whether the same issue reproduces in web vs desktop workflows where applicable.

Confirm the user is signed in with the correct corporate account, system time is accurate, network/VPN connectivity is stable, and the application is not running in offline or limited mode.

Use the command snippets below to collect non-destructive diagnostics. Capture output in the ticket when escalation may be required. Avoid deleting profiles, cached credentials, or managed app data unless the runbook or admin approval explicitly allows it.

- Stop active interaction with suspicious page and capture URL/screenshot for evidence. - Initiate security incident process and follow approved containment guidance immediately. - Have user change password via approved portal and invalidate sessions through identity admin workflow. - Run managed endpoint security checks and review mailbox sign-in activity with security team.