FireEye's CEO also said it's difficult to know whether a mysterious postcard was in fact sent by a Russian intelligence agency.

Its intelligence services will remain a standalone company under the Mandiant name, pending approval.

The proposal includes $9.8 billion for federal civilian agency cybersecurity, which excludes even more cyber funding at the Defense Department.

It's a sign that the hackers are experimenting with new tactics.

Volexity believes, with moderate confidence, that Cozy Bear is behind the spearphishing campaign with an election fraud lure.

The new SolarWinds timeline places the earliest activity at around eight months earlier than previously disclosed.