Justice Department Conducts Court-Authorized Disruption of DNS Hijacking Network Controlled by a Russian Military Intelligence Unit

Today, the Department of Justice and the FBI announced a court-authorized technical operation to neutralize the U.S. portion of a network of small office/home office (SOHO) routers compromised by a unit within Russia’s Main Intelligence Directorate of the General Staff (GRU) Military Unit 26165, also known as APT28, Sofacy Group, Forest Blizzard, Pawn Storm, Fancy Bear, and Sednit. The unit used the routers to facilitate malicious Domain Name System (DNS) hijacking operations against worldwide targets of intelligence interest to the Russian government, including individuals in the military, government, and critical infrastructure sectors.

Since at least 2024, GRU actors have exploited known vulnerabilities to steal credentials for thousands of TP-Link routers worldwide. The actors then accessed many of these compromised routers without authorization and manipulated their settings to redirect DNS requests to GRU-controlled servers – i.e., malicious DNS resolvers. GRU actors were indiscriminate in their initial targeting and manipulation of routers. The actors then implemented an automated filtering process to determine which DNS requests were of interest and warranted interception. For select targets, the GRU’s DNS resolvers provided fraudulent DNS records for specific domains that mimicked legitimate services – including Microsoft Outlook Web Access – to facilitate Actor-in-the-Middle attacks against encrypted victim network traffic. In doing so, the GRU actors harvested unencrypted passwords, authentication tokens, emails, and other sensitive information from devices on the same network as the compromised TP-Link routers.

Read more: Department of Justice