The
"This work indicates that an Advanced Persistent Threat (APT) actor, likely Russian in origin, is responsible for most or all of the recently discovered ongoing cyber compromises of both government and non-governmental networks," the agencies said in a joint statement.
The agencies said they were working to understand the scope of the incident but added they believe it was and continues to be "an intelligence-gathering effort."
In a filing with the
In their statement Tuesday, the agencies said that of those affected "a much smaller number has been compromised by follow-on activity on their systems" including fewer than 10 government agencies.
"This is a serious compromise that will require a sustained and dedicated effort to remediate," the agencies said.
Tuesday's announcement followed comments from
President-elect
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