Top U.S. government agencies said Tuesday that Russia was likely behind the hack of SolarWinds technology, which caused a breach of U.S. government systems, calling it “a serious compromise that will require a sustained and dedicated effort to remediate.” The federal security agencies in a rare joint statement said they believe, based on evidence so far, that the hacking effort was intended for “intelligence gathering,” as opposed to an attempt to damage or disrupt government operations in the United States. “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,” said the Cyber Unified Coordination Group (UCG), which is composed of the FBI, the Cybersecurity and Infrastructure Security Agency (CISA), and the Office of the Director of National Intelligence (ODNI), with support from the NSA. The UCG …