LockBit, one of the most prolific ransomware operations, claims to have 100GB of data from the agency.

The campaign is just the latest example of the increasingly sophisticated world of private zero-day exploit development, researchers said.

The pledges follow the Biden administration saying that Russia's calculus on digital assaults had changed.

Nickel, aka APT15, Ke3chang and Vixen Panda, was snooping on government agencies and others, the company said.

The talks leave out the nation President Biden most often criticizes, but invitees will meet for two days on countering ransomware.

The Lazio region said it would restore the vaccine shot booking system within 72 hours.