Russian state-sponsored attackers compromised more than 18,000 routers spread across more than 120 countries to gain deeper access to sensitive networks for a large-scale espionage campaign before it was recently neutralized, researchers and authorities said Tuesday.

Forest Blizzard, also known as APT28 and Fancy Bear, exploited known vulnerabilities to steal credentials for thousands of TP-Link routers globally. The threat group, which is attributed to Russia’s Main Intelligence Directorate of the General Staff (GRU) Military Unit 26165, hijacked domain name system settings and stole additional credentials and tokens via redirected traffic, the Justice Department said.

The threat group established an expansive espionage network by intruding systems of more than 200 organizations, impacting at least 5,000 consumer devices, Microsoft Threat Intelligence said in a report. 

Operation Masquerade, a collaborative takedown operation led by the FBI, aided by federal prosecutors, the National Security Division’s National Security Cyber section, Lumen’s Black Lotus Labs and Microsoft Threat Intelligence, involved a series of commands designed to reset DNS settings and prevent the threat group from further exploiting its initial means of access. 

“GRU actors compromised routers in the U.S. and around the world, hijacking them to conduct espionage. Given the scale of this threat, sounding the alarm wasn’t enough,” Brett Leatherman, assistant director of the FBI’s cyber division, said in a statement. “The FBI conducted a court-authorized operation to harden compromised routers across the United States.”

Forest Blizzard’s widespread campaign involved adversary-in-the-middle attacks against domains mimicking legitimate services, including Microsoft Outlook Web Access. This allowed attackers to intercept passwords, OAuth tokens, credentials for Microsoft accounts, and other services and cloud-hosted content. 

Microsoft insists company-owned assets or services were not compromised as part of the campaign.

The threat group targeted network edge devices, including TP-Link and MicroTik routers, opportunistically before it identified sensitive targets of intelligence interest to the Russian government, including people in the military, government and critical infrastructure sectors. 

Victims, according to researchers, include government agencies and organizations in the IT, telecom and energy sectors. Lumen identified other victims associated with Afghanistan’s government and others linked to foreign affairs and national law enforcement agencies in North Africa, Central America and Southeast Asia. An unnamed European country’s national identity platform was also impacted, the company said.

Lumen did not find evidence of any compromised U.S. government agencies as part of this campaign, but warned that the activity poses a grave national security threat.

While the full scope of Forest Blizzard’s accomplishments remain under investigation, researchers are confident the bleeding of sensitive information has stopped. 

“The campaign has ceased,” Danny Adamitis, distinguished engineer at Black Lotus Labs, told CyberScoop. “We have observed a gradual decline in communications associated with this infrastructure over the past several weeks.”

Lumen said it observed widespread router exploitation and DNS redirection beginning in August, the day after the United Kingdom’s National Cyber Security Centre published a malware analysis report about a tool used to steal Microsoft Office credentials. The U.K.’s NCSC on Tuesday published details about APT28’s DNS hijacking campaign, including indicators of compromise.

The Justice Department and FBI, acting on a court order, remediated compromised routers in the United States after collecting evidence on Forest Blizzard’s activity. The FBI said Russia’s GRU weaponized routers owned by Americans in more than 23 states to steal sensitive government, military and critical infrastructure information.

The post Feds quash widespread Russia-backed espionage network spanning 18,000 devices appeared first on CyberScoop.

Authorities from multiple countries dismantled SocksEscort, a residential proxy network cybercriminals used to commit large-scale fraud, claiming access to about 369,000 IP addresses since 2020, the Justice Department said Thursday.

Europol, which aided the investigation alongside various law enforcement agencies, Lumen’s Black Lotus Labs and the Shadowserver Foundation, said the malicious proxy service compromised routers and IoT devices in 163 countries. Officials said the proxy network’s payment platform received about $5.8 million from its customers.

The globally coordinated action, dubbed Operation Lightning, took down and seized 34 domains and 23 servers in seven countries. U.S. officials froze a combined $3.5 million in cryptocurrency allegedly linked to the botnet that was created from infected devices.

“Cybercrime thrives on anonymity,” Catherine De Bolle, executive director at Europol, said in a statement. “Proxy services like SocksEscort provide criminals with the digital cover they need to launch attacks, distribute illegal content and evade detection.”

SocksEscort’s operators assembled the botnet by exploiting a vulnerability in residential modems from an unnamed vendor, according to officials.

The cybercrime operation defrauded Americans and U.S. businesses of millions of dollars, the Justice Department said. More than one-quarter of the 8,000 infected routers SocksEscort advertised in February were based in the United States.  

SocksEscort began operating in 2009 and its command-and-control infrastructure went undetected by most tools for a very long time, Ryan English, information security engineer at Black Lotus Labs, told CyberScoop.

The botnet’s infrastructure, which was powered by AVRecon malware, was elusive and maintained a consistently high volume, claiming an average 20,000 victims weekly since early 2024. Its impact peaked in January 2025 when it ensnared more than 15,000 victims daily, according to Black Lotus Labs’ research. 

The company said it observed 280,000 unique IPs as victims of the proxy network since early 2025, and more than half of SocksEscort’s victims were based in the United States and United Kingdom.

“Given the high volume of victim generation, it would not surprise me if they eventually hit something really important that moved them up the list of networks to go after,” Chris Formosa, senior lead information security engineer at Black Lotus Labs, told CyberScoop. 

“They were exclusively marketing to cybercriminals and nowhere else,” he added. “With a network like this, once law enforcement gains legal access to backend infrastructure it can give them a lot of intelligence on other threat actors besides the botnet operators.”

Various agencies from Austria, Bulgaria, Eurojust, France, Germany, Hungary, the Netherlands and Romania assisted in the investigation and takedown.

The post Authorities takedown global proxy network SocksEscort appeared first on CyberScoop.