DOJ Deletes Chinese PlugX Malware from Over 4200 US Computers

The U.S. Department of Justice (DOJ) and FBI have successfully removed PlugX malware from approximately 4,258 U.S.-based computers and networks in a comprehensive international operation targeting Chinese state-sponsored hackers. The malware, deployed by a group known as Mustang Panda, was designed to infiltrate, control, and steal information from victim computers across various sectors.

Working alongside French law enforcement and cybersecurity firm Sekoia.io, the U.S. agencies obtained court authorization in August 2024 to delete the malicious software. The operation specifically targeted a version of PlugX that spreads through USB devices and tricks Windows-based computers into running a covert application during system startup.

The malware has been used extensively by Chinese espionage groups since 2014, targeting a wide range of victims including government organizations, European shipping companies, and Chinese dissident groups across multiple countries. Mustang Panda, the hacking unit behind the malware, has been particularly active in targeting nations involved in China's Belt and Road Initiative.

Sekoia researchers discovered that the PlugX botnet had been exceptionally widespread, with up to 100,000 daily pings from infected hosts and connections from 170 countries. The command and control server managing these infected devices was located in a Tokyo data center, which French authorities were able to access and help neutralize.

The DOJ emphasized the strategic nature of the operation, with Assistant Attorney General Matthew G. Olsen noting the importance of proactively disrupting cyber threats to protect U.S. victims. The FBI notified infected computer owners through their internet service providers, ensuring transparency throughout the process.

This operation highlights the ongoing challenges of cybersecurity and international cyber espionage, demonstrating the collaborative efforts required to combat sophisticated attacks. The successful removal of PlugX malware represents a significant step in protecting critical infrastructure and sensitive information from foreign cyber threats.

Victims are advised to remain vigilant, update their systems regularly, and use robust antivirus software to prevent potential reinfection. The FBI continues to investigate Mustang Panda's ongoing cyber intrusion activities.

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