TeamViewer’s Corporate Network Hacked By Russian Spies

TeamViewer, a leading provider of remote access software, confirmed that its corporate network was breached by a Russian cyberespionage group APT29, also known as Cozy Bear or Midnight Blizzard. The intrusion was detected on June 26 and has raised significant concerns due to the widespread use of TeamViewer’s software globally.

The Germany-based company swiftly activated its security protocols and initiated an investigation. In follow-up statements, TeamViewer emphasized that the breach was contained within its internal corporate IT environment. The company assured its customers that there was no evidence suggesting any impact on the product environment, the TeamViewer connectivity platform, or customer data.

TeamViewer’s response highlighted its robust security architecture, detailing the strong segregation between its corporate IT, production environment, and connectivity platform. This segregation is designed to prevent unauthorized access and lateral movement across different environments, thereby protecting sensitive customer data and system integrity.

The attackers gained access through the credentials of a standard employee account. Using this access, they copied employee directory data, including names, corporate contact information, and encrypted employee passwords. TeamViewer, with support from Microsoft, has mitigated the risk associated with compromised encrypted passwords and implemented enhanced authentication procedures to bolster security.

Initial alerts about the breach were reported by the NCC Group Global Threat Intelligence and the US-based Health Information Sharing and Analysis Center. These organizations identified APT29, a state-sponsored group linked to Russia’s Foreign Intelligence Service, as the likely perpetrators. APT29 is infamous for high-impact cyberattacks on major organizations, including recent breaches of Microsoft’s corporate network.

The hack on TeamViewer follows a pattern of sophisticated cyberespionage campaigns conducted by APT29, targeting entities to gather intelligence that supports strategic decisions for the Kremlin. The group’s activities often focus on accessing sensitive information related to foreign affairs and government operations.

The NCC Group recommended that users remove TeamViewer until further details about the compromise are known. This precautionary measure reflects the critical role that TeamViewer’s software plays in remote access and management for over 600,000 customers and its installation on more than 2.5 billion devices worldwide.