DOJ, Microsoft Target Russian Hackers

The Justice Department announced  the unsealing of a warrant authorizing the seizure of 41 internet domains used by Russian intelligence agents and their proxies to commit computer fraud and abuse in the United States.

As an example of public-private operational collaboration the Department acted concurrently with a Microsoft civil action to restrain 66 internet domains used by the same actors

“This seizure is part of a coordinated response with our private sector partners to dismantle the infrastructure that cyber espionage actors use to attack U.S. and international targets,” said U.S. Attorney Ismail J. Ramsey for the Northern District of California. “We thank all of our private-sector partners for their diligence in analyzing, publicizing, and combating the threat posed by these illicit state-coordinated actions in the Northern District of California, across the United States, and around the world.”

According to the partially unsealed affidavit filed in support of the government’s seizure warrant, the seized domains were used by hackers belonging to, or criminal proxies working for, the “Callisto Group,” an operational unit within Center 18 of the Russian Federal Security Service (the FSB), to commit violations of unauthorized access to a computer to obtain information from a department or agency of the United States, unauthorized access to a computer to obtain information from a protected computer, and causing damage to a protected computer. Callisto Group hackers used the seized domains in an ongoing and sophisticated spear-phishing campaign with the goal of gaining unauthorized access to, and steal valuable information from, the computers and email accounts of U.S. government and other victims.

In conjunction, Microsoft announced the filing of a civil action to seize 66 internet domains also used by Callisto Group actors. Microsoft Threat Intelligence tracks this group as “Star Blizzard” (formerly SEABORGIUM, also known as COLDRIVER). Between January 2023 and August 2024, Microsoft observed Star Blizzard target over 30 civil society entities and organizations – journalists, think tanks, and nongovernmental organizations (NGOs) – by deploying spear-phishing campaigns to exfiltrate sensitive information and interfere in their activities.

The government’s affidavit alleges the Callisto Group actors targeted, among others, U.S.-based companies, former employees of the U.S. Intelligence Community, former and current Department of Defense and Department of State employees, U.S. military defense contractors, and staff at the Department of Energy. In December 2023, the Department announced charges against two Callisto-affiliated actors, Ruslan Aleksandrovich Peretyatko (Перетятько Руслан Александрович), an officer in FSB Center 18, and Andrey Stanislavovich Korinets (Коринец Андрей Станиславович). The indictment charged the defendants with a campaign to hack into computer networks in the United States, the United Kingdom, other North Atlantic Treaty Organization member countries, and Ukraine, all on behalf of the Russian government.