TeamPCP, the threat actor behind an unrelenting flurry of attacks on open-source software this year, has been active much longer than previously thought, according to research Oligo Security shared exclusively with CyberScoop. 

The threat actor, which gained notoriety and has captivated threat hunters as it compromised and injected malicious code into more than 1,000 software packages in less than four months earlier this year, was also responsible for attacks dating back to 2020, Oligo Security found. 

The security vendor’s research team found multiple attacks that bear the markings of TeamPCP, including a late 2025 campaign involving the exploitation of a ShadowRay vulnerability that resulted in the first self-propogating botnet running on hijacked AI infrastructure.

Evidence uncovered during that investigation into the ShadowRay 2.0 campaign was linked to more historical attacks originating from the same IPs, domains and other infrastructure TeamPCP used in attacks that captured widespread attention earlier this year. 

“The scariest thing in this campaign is the speed at which the payloads evolved and changed and adapted to the environment they run in. We saw changes in the speed that we’re not used to seeing in these kinds of attacks. They’re usually slow, careful,” said Uri Katz, director of research at Oligo Security. “This was clearly with the help of AI — the payloads changed rapidly to adjust and change to the environment that they were trying to attack.”

One of the domains that Oligo Security identified in July 2025 was in the profile of TeamPCP’s official GitHub account, said Avi Lumelsky, AI security researcher at Oligo Security. “It’s public, they’re not even trying to hide their identity,” he said. 

From there, Oligo linked TeamPCP to activity tracked under multiple names, including TA-NATALSTATUS and IronErn, spanning from 2020 to late 2025. Much of that activity was traced to the same IPs, domain names, a file server and command-and-control server, researchers said. 

TeamPCP emerged publicly as a brand in late 2025. Soon after, “TeamPCP started to go really broad and do campaigns, which are much more noisy,” said Gal Elbaz, co-founder and CTO at Oligo Security. 

Widespread adoption of AI and TeamPCP’s use of the technology supported this growth as the threat actor built a brand, got more active on social media and boasted publicly about its activities and claimed victims.

“The ability to control the infrastructure and orchestrate the attack with AI was also super new, and I’m sure it helps them,” Elbaz said. 

“All of the companies in the world are in this race to adopt AI because they are afraid their business will die, and they understand, of course, the opportunity. But it’s also what gives the attacker this power to go into it,” he added. “If you don’t really have visibility in what’s going on there or how it behaves, that’s exactly what attackers are after.”

TeamPCP’s more recent attacks have capitalized on new security gaps created by developers’ increasing reliance on AI and the automated systems companies use to deploy code. The threat actor is also consistently wrecking the open-source frameworks and software packages these systems rely on. 

“Most AI infrastructure is open source by design because nobody has the manpower and money to develop everything from scratch,” Lumelsky said. 

“We love open source. We use many of these products ourselves, but it’s all about reading the documentation, and I think many of these tools place the responsibility of using it right and security on the user, and developers are not used to these new kinds of animals,” he added. “That’s why the trust can be exploited at scale.”

As it uncovered a long operational history spanning multiple campaigns, Oligo Security has gained more confidence in understanding how TeamPCP operates. It also means TeamPCP was likely involved in other attacks that haven’t been attributed to it yet or attacks that haven’t been detected. 

“There’s a lot more out there that we haven’t caught or been able to prove up until now,” Elbaz said.

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Botnets powered by residential proxy networks are proliferating, enabling cybercriminals of all types to evade detection by blending in with seemingly legitimate traffic, Lumen Technology’s Black Lotus Labs said in a report Friday.

The global scale of botnets observed by Lumen is currently approaching 60 million victim IP addresses, Chris Formosa, senior lead information security engineer at Black Lotus Labs, told CyberScoop. Roughly 1 in 4 of those compromised IPs are based in the United States, and the true number of infected devices is much greater because there are networks beyond Lumen’s visibility and multiple devices are often unknowingly running a malicious proxy network on the same IP. 

Super-sized botnets are also gaining momentum, according to Lumen, with an average of 10 distinct botnets controlling their own populations of about 1 million active victims daily.

“The only reason these botnets keep getting more and more victims is because there is clearly a market. Aside from criminal activity, who wants access to millions of IPs regularly?” Formosa said. 

That demand for botnets fuels opportunities for growth, reselling, collaboration, and quick rebounds following massive disruptions.

IPIDEA, one of the largest residential proxy networks in operation when its infrastructure was disrupted by coordinated strikes in January, recovered at nearly half-strength within hours and earlier this surpassed its pre-disruption botnet size with a current botnet population of about 10 million IPs, researchers said.

“Their rebuild was eye-opening as they began to rebound from that interdiction,” Ryan English, information security engineer at Black Lotus Labs, told CyberScoop. “Even for how quickly some botnets can rebound, theirs was surprising. We’ve seen them all rebuild, but we haven’t seen anybody do it that fast.”

Meanwhile, botnets are continuously growing, as cybercriminals seek out the cover they provide, more cheap and poorly defended devices hit the market and vendors stop providing security updates for older but still usable products. 

“Your available pool for those proxy hunters grows every year, and it will continue to grow every year,” English said, adding that more than 1 billion devices are currently vulnerable and available to be unknowingly sucked up into botnets.

The challenge for defenders is lopsided, and while disruptions and seizures occur relatively often, botnet operators have formed a global supply chain with pathways that are difficult to break. 

“We have observed multiple residential proxy services collaborating to form what amounts to the largest cooperative network ever seen on the internet,” researchers wrote in the report.

Black Lotus Labs currently tracks more than 30 distinct malicious proxy botnet clusters, and most of those regularly boast more than 100,000 daily victims.

“Our understanding of the various botnets in this space, along with experience in multiple disruptions, leads us to a very important conclusion: taking down a single malicious proxy provider or their botnet in isolation is likely to result in a short-lived solution,” researchers wrote. 

“In recent years, the malicious proxy environment has essentially created the largest collective botnet currently active on the internet, capable of moving millions of IPs within hours to wherever they are needed,” they added. “Until the malicious proxy landscape is properly addressed and regulated on both the private industry and law enforcement sides, this issue will grow and, along with the DDoS botnet landscape, will most likely become a greater problem in the long term.”

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In a novel maneuver for a disruption operation against cyber attackers, industry and law enforcement teamed up to conduct a court takedown of two widely-used criminal tools at once rather than individually, Microsoft said Tuesday.

The takedown simultaneously went after Amadey, a botnet that can serve as a malware delivery system, and StealC, an infostealer. Cybercriminals often use them in conjunction and they rely on the same infrastructure, Microsoft said.

“When multiple parts of an operation are disrupted together, attacks are harder to launch, scale, and recover from,” said Steven Masada, assistant general counsel for Microsoft’s Digital Crimes Unit. “The result: fewer disrupted services, fewer opportunities for cybercriminals to profit, and more friction when they try to rebuild. It’s no longer enough to go after threats one by one. We need to interrupt how the attacks are put together.”

Microsoft had been tracking Amadey with ESET, BitSight, Lumen and Mitsui Bussan Secure Directions. Meanwhile, Europol had been investigating StealC alongside law enforcement partners including Germany’s Federal Criminal Police Office and the Dutch and Danish National Police as well as IBM X-Force and Proofpoint.

They then joined forces and turned to the Racketeer Influenced and Corrupt Organizations (RICO) Act, used to help authorities go after organized crime, to disrupt more than 200 command-and-control servers. Microsoft said it gained insights from its artificial intelligence product Copilot that “allowed the legal team to treat both malware families as part of a single criminal conspiracy.”

Microsoft regularly leads court-authorized disruption operations, but the industry and law enforcement partnerships combined with AI to expand data collection and identify connections beyond what one company could normally do, it said.

Amadey and StealC were linked to more than 140,000 infected computers around the globe in the first week of May alone, the company said. StealC has ranked among the top infostealers for years since its emergence in 2023 and sells in underground forums as a malware-as-a-service. It’s typically used by Russia-linked groups.

Amadey dates back to 2018, and is also commonly employed by Russian groups, including in attacks on Ukraine.

Their interaction shows the assembly line-like structure of modern cybercrime, Microsoft said. Even if the cybercriminals behind both tools never coordinate, their tools are designed to work together, it said.

“StealC is an infostealer that collects sensitive data from browsers, cryptocurrency wallets, messaging applications, email clients, and gaming platforms,” the company wrote in a separate blog post. “It is a malware-as-a-service (MaaS) offering that threat actors use to generate customized payloads and manage stolen data through a centralized web panel. Meanwhile, Amadey is a MaaS loader that threat actors use to deliver StealC and other malware. Modular, pay-as-you-go models like StealC and Amadey allow threat actors to use a single initial infection to quickly escalate into multiple other threats.”

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Authorities on Thursday disrupted a botnet, a malware framework and seized infrastructure that Evil Corp and other cybercrime groups used to steal data and break into various networks.

The globally coordinated effort targeted SocGholish, multi-stage malware that has compromised websites, redirected users to traffic distribution systems (TDS) and slipped malware into their networks since 2017.

“The malware establishes an initial foothold into victim computers, collectively known as a botnet, and is then used by threat actors for further targeting with ransomware campaigns and espionage,” the FBI’s cyber division said in a statement. 

Cybersecurity firms, researchers and officials from the United States, Canada, Germany, the Netherlands and Europol took down 106 servers and remediated nearly 15,000 sites that were infected with the malware. Officials also disabled the botnet and notified victims.

Sites infected with SocGholish, which are primarily hosted on WordPress, were widespread and provided everyday services including restaurants and auto repair shops, according to the Dutch National Police. 

The botnet, also known as “FakeUpdates,” is linked to the Russian cybercrime group Evil Corp. It also provided initial access to other ransomware variants, including DoppelPaymer, WastedLoocker, Hades Ransomware, LockBit, RansomHub and others, according to Infoblox, which participated in the takedown. 

Proofpoint, which also participated in the disruption, described Evil Corp as one of the most prominent cybercrime groups in operation and the “grandfather” of a threat type that compromises websites and uses TDS to redirect users to malware.

Following the takedown, the FBI issued a public service announcement warning about cybercriminals using TDS to break into victim networks for ransomware or other financial scams. 

Cybercriminals redirect traffic from sites to bypass firewalls, obscure their activity, identify potential victims and send them to phishing pages to steal credentials, initiate financial scams, access networks, deliver other malware, and sell access to other cybercriminals, officials said.

The law enforcement action was part of Operation Endgame, a multinational effort targeting cybercrime since 2024, and more narrowly for the FBI part of Operation Riptide, an ongoing campaign targeting cybercriminals and the infrastructure and financial networks they use to commit fraud.

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CrowdStrike has dismantled the Glassworm botnet in an operation aided by Google and Shadowserver, stripping the operators’ access to infrastructure that helped threat actors infect hundreds of pieces of open-source software with malware since early 2025, the company said Tuesday. 

The coordinated effort involved the simultaneous takedown of four attacker-controlled servers that were designed to obscure the botnet’s operations and remain resilient against disruptions.

CrowdStrike and partners took down infrastructure, severed access to the botnet’s most critical services, impeded operation momentum and slowed the attackers’ ability to scale, Adam Meyers, senior vice president of counter adversary operations at CrowdStrike, told CyberScoop.

“The broader goal is sustained pressure that forces the adversary to spend time, resources, and operational energy reconstituting infrastructure instead of targeting victims,” Meyers added. “By exposing tradecraft and sharing intelligence, defenders can harden developer environments, CI/CD pipelines, and software supply chains against similar activity. That raises the operating cost for the adversary and gives defenders an advantage.”

Glassworm has targeted software developers in order to access source code repositories, cloud platforms, integration and delivery processes, and open-source package registries to push malware into the supply chain and trigger compromises downstream. 

The threat group behind the botnet, which is likely based in Russia, according to CrowdStrike, fed malware into VSCode extensions, npm and Python packages and more than 300 GitHub repositories, researchers said. 

Glassworm affected Windows, macOS and Linux systems with data and credential theft, and a remote-access tool called GlasswormRAT.

“What stood out about Glassworm was the operational sophistication around propagation and automation,” Meyers said. “This wasn’t just a smash-and-grab compromise of a package repository. The operation was designed to move through trusted developer workflows in a way that could expand reach very quickly if left unchecked.”

The botnet relied on four layered channels that CrowdStrike disrupted, including the Solana blockchain, BitTorrent’s peer-to-peer network, Google Calendar and virtual private servers hosted by commercial providers. 

“As part of our disruption efforts, we are working with partners to bring more pain to attackers, especially when we see them abusing our products or targeting our users,” John Hultquist, chief analyst at Google Threat Intelligence Group, said in a post on X.

Piotr Kijewski, CEO of the Shadowserver, said the non-profit organization assisted with some analysis and data sharing but noted the disruption was mostly CrowdStrike work.

The countermeasures took down “the connective tissue of the operation to create cascading operational pain,” Meyers said. “This forces the adversary to rebuild, while exposing tradecraft.”

CrowdStrike said the takedown demonstrates how the security industry can effectively thwart supply-chain threats by proactively disrupting the precise infrastructure attackers use without waiting for lengthy judicial processes. 

“When threat actors operate from jurisdictions where law enforcement cooperation is limited or nonexistent, disruption becomes one of the most effective tools available. If you can’t put handcuffs on the operator, you focus on dismantling the infrastructure, trust relationships, and operational dependencies,” Meyers added. 

The security company shared indicators of compromise to help organizations hunt for potential infections in their environments and called for other vendors, law enforcement agencies, platform operators and the open-source ecosystem to muster equal determination in responding to threats in the software supply chain.

“The more visibility and alignment you create across the ecosystem, the harder it becomes for the actor to quietly stand the operation back up,” Meyers said. “You may not eliminate the threat actor entirely, but you can absolutely reduce effectiveness, limit reach, and raise the cost of doing business.”

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Authorities arrested and unsealed charges against a Canadian man accused of running Kimwolf, one of the most far-reaching DDoS botnets on record, the Justice Department said Thursday.

Jacob Butler was arrested Wednesday in Ottawa, Canada, and awaits extradition to the United States where he is charged with aiding and abetting computer intrusions and, if convicted, faces up to 10 years in prison.

Investigators said the 23-year-old, also known as “Dort,” was a principal administrator of Kimwolf, a variant of the record-setting Aisuru DDoS botnet that spread like wildfire and eventually took over more than 2 million Android TV devices after its operators figured out how to abuse residential-proxy networks for local control.

Authorities in March seized infrastructure powering the Kimwolf, Aisuru, JackSkid and Mossad botnets, which hijacked a combined three million devices and launched more than 300,000 DDoS attacks collectively.

Kimwolf, which operated as a DDoS-for-hire service for other cybercriminals, initiated more than 25,000 attacks, resulting in network outages, disruptions and financial losses exceeding millions of dollars, officials said. Officials also said they found evidence linking Kimwolf to DDoS attacks targeting Department of Defense Information Network IP addresses.

“Kimwolf and the botnets associated with this operation have supported persistent corporate intrusion efforts and been used by a wide range of serious threat actors,” Zach Edwards, staff threat researcher at Infoblox, told CyberScoop.

Authorities searched Butler’s residence during the globally coordinated operation, but did not arrest him until Wednesday, roughly two months later. Officials filed a criminal complaint against Butler in the U.S. District Court for the District of Alaska in April, and unsealed the complaint following his arrest.

A special agent with the Defense Criminal Investigative Service confirmed Butler’s identity and involvement in the Kimwolf botnet after Butler used the same IP address to access multiple email accounts he controlled and Discord accounts linked to Kimwolf. 

“I have observed significant operational security lapses on Butler’s part resulting in patterns of overlapping IP usage among a Google account in Butler’s true name, other Google accounts that I believe to be controlled by Butler due to use of the same machine cookies, and Discord accounts which have been used in support of the KimWolf operation,” the special agent said in an affidavit. 

“The Discord accounts show patterns of overlapping IP usage with the KimWolf backend server. These IP addresses appear to be proxy or VPN IPs which were likely used by Butler in an unsuccessful attempt to evade law enforcement scrutiny. However, like many cybercriminals, Butler did not use proxy or VPN IP addresses exclusively,” the special agent added. 

Authorities described the botnet takedowns in March in nearly conclusive terms at the time, yet court records indicate the Kimwolf botnet is back in operation. 

“While today’s announcement is encouraging to see, there are still hundreds of millions of insecure IoT and network devices connected to sensitive government, corporate and home networks, and these remain a priority target for threat actors looking to build the next version of Kimwolf,” Edwards said.

“Until we find solutions to this underlying problem,” he added, “we’ll unfortunately continue to play Whac-A-Mole with botnet operators year after year.”

You can read the affidavit supporting the criminal complaint against Butler below.

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