A tool for managing user identities, credentials, and access across on-premises and cloud environments
- On the PC that was infected, run a full antivirus scan before changing anything else. Microsoft’s guidance is to clear malware first, then change the password. On Windows 8.1 or Windows 10/11, Windows Defender is available from Start and can be used to run the scan.
- If access is still available anywhere, immediately review recent sign-in activity and mark anything unrecognized:
- Go to the Security basics page for the Microsoft account.
- Select Review activity.
- On the recent activity page, use This wasn't me for unusual activity or Secure your account for suspicious recent activity.
- Change the password from the Security basics page if access is still possible. If sign-in no longer works, use Forgot my password and select I think someone else is using my Microsoft account.
- Check account settings that attackers commonly change:
- connected accounts
- forwarding
- automatic replies
- If the account is blocked because of unusual sign-in activity, use the Sign-in Helper. If that does not work, use the When you can't sign in to your Microsoft account path from the Outlook.com unblock guidance.
- If the automated recovery flow is failing or rate-limited, use the official Microsoft support path from a different account:
- Go to Contact - Microsoft Support.
- Select Get Help.
- Scroll to Contact Support.
- Choose Other Products.
- Choose Manage account security.
- Use chat or callback if available.
- If the account is still signed in on another device, check whether that trusted session can still be used to verify identity and update security settings.
- Because a payment method is linked, remove or protect the card outside the Microsoft account immediately through the bank or card issuer.
References:
- How to recover a hacked or compromised Microsoft account
- What happens if there's an unusual sign-in to your account
- Unblock my Outlook.com account
- My Microsoft Account was hacked and the primary email was changed to a jerkoffmail.com address - Microsoft Q&A
- My Microsoft Account Was Hacked and the Email Was Changed - Microsoft Q&A