FBI mass-erases Chinese malware ‘PlugX’ from thousands of U.S. computers
On January 14, the Justice Department and FBI announced a multi-month law enforcement operation that, alongside international partners, deleted “PlugX” malware from thousands of infected computers worldwide. As described in court documents unsealed in the Eastern District of Pennsylvania, a group of hackers sponsored by the People’s Republic of China (PRC), known to the private sector as “Mustang Panda” and “Twill Typhoon,” used a version of PlugX malware to infect, control, and steal information from victim computers.
According to court documents, the PRC government paid the Mustang Panda group to, among other computer intrusion services, develop this specific version of PlugX. Since at least 2014, Mustang Panda hackers then infiltrated thousands of computer systems in campaigns targeting U.S. victims, as well as European and Asian governments and businesses, and Chinese dissident groups. Despite previous cybersecurity reports, owners of computers still infected with PlugX are typically unaware of the infection. The court-authorized operation announced today remediated U.S.-based computers infected with Mustang Panda’s version of PlugX.
“The Department of Justice prioritizes proactively disrupting cyber threats to protect U.S. victims from harm, even as we work to arrest and prosecute the perpetrators,” said Assistant Attorney General Matthew G. Olsen of the Justice Department’s National Security Division. “This operation, like other recent technical operations against Chinese and Russian hacking groups like Volt Typhoon, Flax Typhoon, and APT28, has depended on strong partnerships to successfully counter malicious cyber activity. I commend partners in the French government and private sector for spearheading this international operation to defend global cybersecurity.”
The international operation was led by French law enforcement and Sekoia.io, a France-based private cybersecurity company, which had identified and reported on the capability to send commands to delete the PlugX version from infected devices. Working with these partners, the FBI tested the commands, confirmed their effectiveness, and determined that they did not otherwise impact the legitimate functions of, or collect content information from, infected computers. In August 2024, the Justice Department and FBI obtained the first of nine warrants in the Eastern District of Pennsylvania authorizing the deletion of PlugX from U.S.-based computers. The last of these warrants expired on Jan. 3, 2025, thereby concluding the U.S. portions of the operation. In total, this court-authorized operation deleted PlugX malware from approximately 4,258 U.S.-based computers and networks.
The FBI, through the victims’ internet service providers, is providing notice to U.S. owners of Windows-based computers affected by this court-authorized operation.
The FBI is still actively investigating Mustang Panda’s computer intrusion activity. If you believe you have a compromised computer or device, please visit the FBI’s Internet Crime Complaint Center (IC3). You may also contact your local FBI field office directly. The FBI strongly encourages the use of anti-virus software as well as the application of software security updates to help prevent reinfection.
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(Source: FBI)
Posted by Richard Webster, Ace News Today
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