More: The data breach could be massively significant and may have all sorts of national security and counterintelligence implications. Criminals from the same ecosystem as ShinyHunters have previously used hacked data like phone records to track, intimidate, and harass the FBI agents investigating them. The highly sensitive data could also be a boon to foreign intelligence agencies who want to better understand how one of the most important law enforcement and intelligence agencies in the U.S. operates. And if the data fell into the hands of more criminals, FBI agents and their spouses could face serious threats to their safety.

The representative provided 404 Media with a sample appearing to contain the personal data of 5,000 FBI employees. That data included an alleged address, phone number, date of birth, and in some cases details on their spouse.

404 Media put some of the sample phone numbers into open source intelligence tool OSINT Industries and found they did correspond to people with the same name as listed in the sample file. 404 Media also searched some of the records through compromised data tool Darkside, made by cybersecurity company District 4. That revealed some of the phone numbers are associated with U.S. Department of Justice personnel.