On November 13, 2021, a hacker named Conor Brian Fitzpatrick, going by his alias "Pompompurin", compromised the FBI's external email system, sending thousands of messages warning of a cyberattack by cybersecurity CEO Vinny Troia who was falsely suggested to have been identified as part of The Dark Overlord hacking group by the United States Department of Homeland Security.[1][2][3]
The emails were sent to addresses taken from the American Registry for Internet Numbers database and it was reported that the hacker used the FBI's public-facing email system which made the emails appear legitimate. The campaign was likely done in an attempt to defame Troia. Fitzpatrick later claimed responsibility for the hack.[4]