MFA Bombing

Is your multifactor authentication at risk?

Threat Alert

MFA Bombing

Summary

Multifactor authentication (MFA) is a valuable layer of protection that helps keep the bad guys out of your accounts. MFA bombing is a technique some bad guys use to get around MFA by annoying or confusing the victim into authenticating access they never requested.

The MFA methods criminals get around using MFA bombing are those which require either push notifications or a phone call coupled with pressing a number on their keypad. The criminals trick their victims into allowing access by sending many prompts—often at times the target is expected to be asleep. These attempts may be incessant over the span of a few hours or a few times a night. All the attacker needs is for the target to mess up one time.

Take Aways:
  • Keep your guard up. If you didn’t request access to an account, do not even consider pressing the AUTHENTICATE button.
  • Consider looking into a form of MFA that uses FIDO2 framework, which is harder for the bad guys to get around.
  • Remember: A company should never call you up and request you to send MFA credentials as a part of their process. Legit companies know the security risk this poses.

Want To Know More?

Learn about more kinds of MFA bombing from Ars Technica’s original post.

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