The hackers sent tens of thousands of emails warning of a possible cyberattack, threat-tracking organization Spamhaus Project said on its Twitter account.
A copy of an email posted by Spamhaus on Twitter showed a subject line of “Urgent: Threat actor in systems” and appeared to end with a sign-off from the Department of Homeland Security.Both the FBI and Cybersecurity and Infrastructure Security Agency are aware of the incident, the FBI statement said.
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