T1621 Multi-Factor Authentication Request Generation — ATT&CK Technique
Adversaries may attempt to bypass multi-factor authentication (MFA) mechanisms and gain access to accounts by generating MFA requests sent to users. Adversaries in possession of credentials to Valid Accounts may be unable to complete the login process if they lack access to the 2FA or MFA mechanisms required as an additional credential and security control. To circumvent this, adversaries may abuse the automatic generation of push notifications to MFA services such as Duo Push, Microsoft Authenticator, Okta, or similar services to have the user grant access to their account. If adversaries lack credentials to victim accounts, they may also abuse automatic push notification generation when this option is configured for self-service password reset (SSPR). In some cases, adversaries may continuously repeat login attempts in order to bombard users with MFA push notifications, SMS messages, and phone calls, potentially resulting in the user finally accepting the authentication request in response to “MFA fatigue.”
Detection coverage (20)
- Multifactor Authentication Denied medium
- Multifactor Authentication Interrupted medium
- Okta Authentication Failed During MFA Challenge
- Okta Mismatch Between Source and Response for Verify Push Request
- Okta Multiple Failed MFA Requests For User
- Okta Successful Single Factor Authentication
- PingID Mismatch Auth Source and Verification Response
- PingID Multiple Failed MFA Requests For User
- PingID New MFA Method After Credential Reset
- PingID New MFA Method Registered For User
- ASL AWS Multi-Factor Authentication Disabled
- AWS Console Login Failed During MFA Challenge
- AWS Multi-Factor Authentication Disabled
- AWS Multiple Failed MFA Requests For User
- Azure AD Authentication Failed During MFA Challenge
- Azure AD Multiple Denied MFA Requests For User
- Azure AD Multiple Failed MFA Requests For User
- GCP Authentication Failed During MFA Challenge
- GCP Multiple Failed MFA Requests For User
- O365 Multiple Failed MFA Requests For User