U.S. and South Korean cyber agencies warned Monday about a ransomware-as-a-service outfit, Gunra, that reportedly recruits ethical hackers and penetration testers and benefits from North Korean government-linked hackers’ tools to target government and critical infrastructure organizations.

Gunra has gone after sectors such as academia, financial services and insurance, government services and facilities, healthcare, manufacturing and construction, media, retail, transportation and utilities. Its global scope is far-ranging, according to Monday’s alert: Africa, the Americas, the Asia-Pacific, Europe and the Middle East.

“Gunra is another variant in the ongoing trend of ransomware attacks causing disruption and harm to U.S. and international organizations,” said Chris Butera, acting assistant director for cybersecurity at the Cybersecurity and Infrastructure Security Agency, which produced the advisory with the Department of Defense’s Cyber Crime Center, FBI, National Security Agency, Secret Service and Republic of Korea’s National Police Agency.

The alert is part of the #StopRansomware series, a joint FBI-CISA project aimed at network defenders.

The FBI first took notice of Gunra in April of last year. The double-extortion group established a data leak site on Tor to list victims and publish purloined data. By January of this year, Gunra had launched a formal ransomware-as-a-service affiliate and was growing in its ambition, Monday’s alert states.

“The FBI observed the group adopting new branding aliases (notably operating under the name Golden Community) to support this expansion,” it reads. “Gunra has further commercialized its platform by actively recruiting penetration testers and ethical hackers to serve as initial access brokers, offering a share of the ransom profits in exchange for enterprise network access.”

Gunra seeks initial access with known vulnerabilities in internet-facing devices like firewalls or virtual private networks, and is based on or influenced by the Conti ransomware code leaked in 2022, according to the agencies.

Research published in July by a South Korean cybersecurity firm took note of Gunra overlap with Lazarus Group, although it doesn’t explicitly mention the latter group’s name.

“These commonalities suggest that although the state-sponsored threat group and the Gunra ransomware group appear to be separate threat actors with different ultimate objectives, they may have shared certain techniques, tools, and infrastructure or collaborated to a limited extent during the attacks,” AhnLab wrote in its report.

That kind of North Korean government-ransomware gang collaboration dates back to at least 2024. Nor is Gunra alone among ransomware-as-a-service outfits recruiting penetration testers.

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Amazon’s security researchers say a hacking group tied to North Korea targeted small, little-noticed software packages more than a year before it struck one of the internet’s most widely used programming tools.

The company’s threat intelligence team said Wednesday at a media roundtable at its Arlington, Va., offices that the same group linked to the recent compromise of the open-source axios software library also planted malicious code in a package called typo-crypto in March 2025, a full year before the axios breach. Researchers found the connection while tracing domain records tied to the axios attack back to earlier activity.

“We believe the March 2025 typo-crypto campaign was a rehearsal,” said CJ Moses, Amazon’s chief information security officer, adding that the target’s small scale let the group test its methods “without putting that on the big stage.”

Amazon said the group also compromised two other packages, debug and chalk, in September 2025. Until now, those three incidents had not been publicly linked to the same actor. Security researchers track the group under several names, including UNC1069, Sapphire Sleet and Stardust Chollima. 

Axios, debug and chalk are code libraries used by software developers around the world to build applications. Axios alone is downloaded more than 100 million times a week. “That number represents real organizations putting real code into production systems every single week,” Moses said.

In the typo-crypto case, the malicious file was named “core.js” and was made to look like a legitimate, unrelated package called core-js. Amazon said the file activated only when it received a specific numeric input, then reached out to a server controlled by the attackers to download a second piece of code. That second stage was written differently depending on whether the infected computer ran Windows, macOS or Linux. The code combined encoded text with a cipher, a method Moses said was meant to slow down analysis, including by AI-based review tools, without relying on heavy encryption.

Amazon said the typo-crypto package had few downloads compared with axios, debug or chalk. Researchers believe that initial target served as practice, letting the group refine its approach before turning to more widely used software. “They did what a lot of people do: crawl, walk, run,” Moses said. 

In each of the four cases, Amazon said, the attackers built a relationship with a maintainer who already had access to a package, then used that access to publish an update containing hidden code. “They didn’t break through a window,” Moses said. “They basically earned the trust of an employee to hand them the keys.”

Cybersecurity firm Wiz separately found that about 1 in 10 cloud computing environments were affected by the debug and chalk incident within a two-hour span, a finding Moses cited to illustrate how fast the impact spread. “Going from there not being a vulnerability, to there being a vulnerability, to there being an exploited vulnerability … used to be days to weeks. Now it’s hours to minutes,” he said.

Rick Anthony, senior engineering manager at Amazon Web Services, said the research further shows how attackers face two basic problems in these types of incidents: getting malicious code into a package that will eventually run inside an organization, and keeping that code hidden from developers or security tools. He said groups are increasingly building reputations as legitimate contributors over time. 

“Let me get my package deployed in as many places as possible so that I can spring the trap later,” said Anthony, describing the mindset behind the approach.

Researchers said generative AI has made it easier for attackers to produce code, documentation and contribution histories that look authentic. Anthony also described a technique in which attackers register package names that AI coding tools sometimes generate by mistake, so a developer following an AI suggestion could install malicious software without making any typing error of their own.

The findings come two years after a separate incident involving a program called xz-utils, in which an attacker spent time gaining the trust of the software’s maintainers before inserting a backdoor. Moses pointed to that case as an early example of a pattern now appearing “at scale” and tied to a nation-state.

Since that incident, separate groups have been running roughshod over open-source software. Another group known as TeamPCP has compromised and injected malicious code into more than 1,000 software packages over a four-month span this year. 

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The people orchestrating North Korea’s IT worker scheme are funneling money through a web of front companies and intermediaries, including sanctioned entities, that partly fund Russia’s war effort against Ukraine, DTEX said in a report Tuesday.

The security firm’s research shows that the scheme is moving beyond funding the country’s weapons program and into a bigger pool that supports many of the regime’s objectives. This includes manufacturing weapons and supplying them to Russia’s military, according to DTEX.

“When we think IT workers, we typically think head down, get your money, support the weapons program,” Michael Barnhart, nation state investigator at DTEX and lead author of the report, told CyberScoop.

“It’s a broad cover-all statement when we say it’s supplying the weapons program,” he said. “That’s the predominant place it goes,” but many other domestic programs and entities tasked with other projects are taking cuts from that pool of money as well. 

Barnhart corroborated previously leaked data from an internal North Korean payment server, which included 390 IT worker accounts, chat logs and transaction data.

He mapped the transactions to organizations that received those funds, including multiple sanctioned entities: Sobaeksu, Saenal, and Songkwang. 

The money trail also showed $1.97 million in payments from North Korean IT workers between December 2025 and February 2026 flowing directly through Korea Ryonbong General Corp, a sanctioned defense entity that procures weapons for the regime’s military programs.

Western officials previously reported that North Korea provided ammunition and weapons to Russia in 2023, and in the fall of 2024 sent upwards of 15,000 soldiers to fight alongside Russian troops, according to the Council on Foreign Relations.

“This is a consequence that is often overlooked,” Barnhart wrote in the report. “Revenue from the IT worker stream does not stop at a resume scam or a payroll-abuse story. It can feed a larger DPRK system that supports sanctioned entities, domestic state needs, and a Russia war effort that is actively consuming all facets of North Korean weapons and military support.” 

Data from the internal North Korean payment server, which was first published by ZachXBT in April, is controlled by “PC-1234,” a single administrator that DTEX has been tracking for a while. The wallet and its cluster of activity remains active, Barnhart said. 

The three months of previous activity attributed to the wallet amounted to more than $2.84 million, which then flowed upward into dozens of organizations. 

“It’s not a top-down funded regime. It’s a bottom-up,” Barnhart said. “Everyone makes money at the bottom and then they take a tiny cut, and then the money goes upwards to what we just blanketly say is the weapons program. But really, it can go a lot more places.”

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The PolinRider campaign has compromised more than 100 legitimate open source packages and repositories to deliver a backdoor and information stealer to developers.

The post North Korean Hackers Target Open Source Developers in Supply Chain Attacks  appeared first on SecurityWeek.

Two U.S. nationals were sentenced to 18 months in prison for running laptop farms that facilitated North Korea’s expansive remote IT workers scheme, the Justice Department said Wednesday.

Matthew Issac Knoot and Erick Ntekereze Prince both received and hosted laptops at their residences to dupe U.S. companies into thinking remote IT workers they hired were located in the country. The pair’s separate schemes impacted almost 70 U.S. companies and generated a combined $1.2 million in revenue for the North Korean regime.

“The FBI and our partners will continue to disrupt North Korea’s ability to circumvent sanctions and fund its totalitarian regime,” Brett Leatherman, lead of the FBI’s Cyber Division, said in a statement. “These cases should leave no doubt that Americans who choose to facilitate these schemes will be identified and held accountable. Hosting laptops for DPRK IT workers is a federal crime which directly impacts our national security, and these sentences should serve as a warning to anyone considering it.”

Knoot, of Nashville, Tennessee, and Prince, of New York, received the laptops from unsuspecting U.S. companies and installed remote desktop applications on the machines to enable co-conspirators to work from anywhere while appearing to be based at their respective residences.

Prince’s company Taggcar was contracted to supply IT workers to victim U.S. companies from June 2020 through August 2024. He pleaded guilty in November 2025 to wire fraud conspiracy for his yearslong involvement in the North Korean IT worker scheme. 

Prince was indicted and charged in January 2025 along with his alleged co-conspirators, who collectively obtained work for North Korean IT workers at 64 U.S. companies, earning nearly $950,000 in salary payments. 

A federal judge sentenced Prince Wednesday and ordered him to forfeit $89,000, which is the amount he netted personally. 

Knoot was arrested in August 2024, a year after the FBI searched his home. Officials said he made multiple false and misleading statements and destroyed evidence to obstruct the investigation at that time. 

Victim companies paid North Korean workers linked to Knoot’s laptop farm more than $250,000 from July 2022 to August 2023. The remote IT workers transferred those funds to Knoot and accounts associated with North Korean and Chinese nationals, officials said. 

Knoot was sentenced May 1 and ordered to pay $15,100 in restitution to the victim companies and forfeit an additional $15,100, which is equivalent to the amount of his direct take from the scheme.

The pair of North Korean operatives join a growing list of people who have been charged and jailed for supporting the regime’s scheme that generates hundreds of millions of dollars annually for the country’s military and organizations involved in its weapons programs.

Authorities have been cracking down on the malicious insider activity by seizing cryptocurrency linked to the theft, and targeting U.S.-based facilitators who provided forged or stolen identities and hosted laptop farms for North Korean operatives. 

The countermeasures are stacking up, but the scheme is widespread and has infiltrated an undetermined number of businesses, including hundreds of Fortune 500 companies.

Federal judges previously sentenced other people to prison for their involvement in the scheme, including Keija Wang and Zhenxing Wang; Audricus Phagnasay, Jason Salazar and Alexander Paul Travis; Oleksandr Didenko and Christina Chapman. 

“These sentences hold accountable U.S nationals who enabled North Korea’s illicit efforts to infiltrate U.S. networks and profit on the back of U.S. companies,” John A. Eisenberg, assistant attorney general for national security, said in a statement. 

“These defendants helped North Korean ‘IT workers’ masquerade as legitimate employees, compromising U.S. corporate networks and helping generate revenue for a heavily sanctioned and rogue regime,” he added. “The National Security Division will continue to pursue those who, through deception and cyber-enabled fraud, threaten our national security.”

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