North Korean hackers have turned hundreds of real people’s faces into reusable tools for cyberattacks, secretly recording victims during counterfeit video meetings and replaying their recordings to impersonate trusted colleagues, compromise new targets, and steal cryptocurrency.

The Federal Bureau of Investigation (FBI) says the operation, called “FaceStealer,” has stolen more than $400 million in cryptocurrency over 18 months and amassed more than 900 webcam recordings of victims, exposing an identity attack built around authentic faces, hijacked accounts, synthetic video, and stolen professional relationships.

The Department of Justice announced Thursday that authorities had seized cloud infrastructure…