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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A longtime former member of Conti, a ransomware group that attacked more than 1,000 organizations globally before it disbanded in 2022, pleaded guilty to participating in some of those attacks in federal court Wednesday, the Justice Department said.

Oleksii Oleksiyovych Lytvynenko, also known as Alexsey Alexseevich Litvinenko, admitted he joined the prolific cybercrime group in September 2021 and held data on 12 victims, including eight based in the United States. The 44-year-old told the court he developed malware that Conti used in some of its attacks, according to officials. 

“The defendant and his conspirators used the Conti ransomware to terrorize people and businesses in the United States and around the world, causing millions of dollars in damage,” A. Tysen Duva, assistant attorney general of the Justice Department’s criminal division, said in a statement.

Lytvynenko and his co-conspirators used the ransomware to attack more than 1,000 victims globally, ensnaring victims in 47 states, Washington, Puerto Rico and about 31 countries, according to the Justice Department. The FBI estimates Conti extorted more than $150 million in ransom payments from victims.

The Ukrainian national pleaded guilty to conspiracy to commit wire fraud and faces up to 20 years in prison upon sentencing, which is scheduled for Sept. 10. 

Lytvynenko was arrested in Ireland in July 2023, extradited to the United States in October 2025, and remains in federal custody in Tennessee where at least three of his victims are based. He left Ukraine in 2022 and obtained temporary protective status in Ireland, residing in Cork at the time of his arrest. 

Prosecutors said Lytvynenko and his co-conspirators extorted about $634,000 in Bitcoin from two victims in Tennessee, including an undisclosed government entity that resulted in the compromise of a sheriff’s department, local emergency medical services and a local police department. According to an indictment that was unsealed last fall, Lytvynenko and his co-conspirators also leaked data they stole from another Tennessee-based victim after it refused to pay a $3 million ransom demand.

Four of Lytvynenko’s alleged co-conspirators — Maksim Galochkin, Maksim Rudenskiy, Mikhail Mikhailovich Tsarev and Andrey Yuryevich Zhuykov — were indicted in 2023 in the same federal court for crimes related to their suspected involvement in Conti attacks from 2020 to 2022. 

Authorities said Lytvynenko engaged in cybercrime after Conti disbanded and its members splintered off into new groups, adding that he “was asleep but within arms’ reach of an open laptop running Cobalt Strike” at the time of his arrest.

At one point, Conti was among the most prolific ransomware groups globally, impacting hundreds of critical infrastructure providers, Costa Rica’s government in 2022, and ultimately leading the State Department to offer a $10 million reward for information related to Conti’s leaders. The group was notoriously resilient, bouncing back with new infrastructure and hitting new targets after a massive leak exposed chats between the group’s members in 2022.

Conti disbanded later that year, but members of the Cyrillic-language group rebranded under three subgroups: Zeon, Black Basta and Quantum, which quickly rebranded to Royal, before rebranding again to BlackSuit in 2024.

“Lytvynenko’s guilty plea is a significant step toward holding cyber criminals accountable for the damage they inflict on victims worldwide,” Brett Leatherman, assistant director of the FBI’s cyber division, said in a statement “Lytvynenko profited from fear and coercion, conspiring to use Conti ransomware to extort victims and steal their data.”

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Artificial intelligence is an “unstoppable force” that allows tech to be “weaponized just below the threshold of traditional warfare,” including in cyberspace, the head of a U.K. intelligence, security and cybersecurity agency said Wednesday.

We live in a world “where the latest frontier AI is rapidly unearthing fault lines in technologies our society relies on every single day,” said Anne Keast-Butler, director of the Government Communications Headquarters (GCHQ) spy agency. “The ground beneath our feet is shifting, and shifting fast. Which means cybersecurity has never been more important.”

She added; “we need to reimagine cybersecurity in the AI world.”

Keast-Butler said her agency has spent the last few months developing defensive capabilities that are integrated with agentic AI, and embedding it into its operations “responsibly and ethically.”

Her speech offered the view of one of the world’s cyber superpowers about how AI is evolving both cyber offense and defense. The GCHQ is the largest of the U.K.’s spy agencies and home to the National Cyber Security Centre.

The U.K.’s AI Security Institute recently reported on how advanced AI models have surpassed prior benchmarks for autonomously uncovering vulnerabilities. At the same time, government officials in Europe, the United States and elsewhere have warned about how AI will exacerbate cyber risks.

Keast-Butler said Wednesday that “warfare is being reconfigured; increasingly data-driven, AI-enabled, and automated in conflicts from Ukraine to Iran.”

Overall, “AI is an unstoppable force with great opportunity. But it’s also a force with risks,” she said. “As AI gains increased autonomy, we all have an intergenerational duty to harness and secure it for good; to protect our national security, our economy and our way of life.”

She warned about China’s arrival as a tech superpower, which includes its sophisticated cyber capabilities. She said China recognizes the value of AI combined with the availability of massive amounts of data.

And Russia is upping its use of hybrid warfare against both Ukraine and the U.K., Keast-Butler said, with both cyber and physical forces.

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Sean Plankey, most recently the nominee for director of the Cybersecurity and Infrastructure Security Agency, is joining defense technology company UFORCE as its U.S. chief executive officer.

The London-based company created out of nine Ukrainian-based firms announced Plankey’s move Monday less than a month after he withdrew his nomination amid difficulties overcoming objections from senators who had placed a hold on it.

Plankey’s a cyber veteran of the first Trump administration but also had been serving as senior adviser on the Coast Guard at the Homeland Security Department, retiring from the Coast Guard this year.

UFORCE makes combat drones for air, land and sea and plans to have its first U.S.-made unmanned surface vessels hitting the water by this summer. The startup reportedly brought its valuation to $1 billion earlier this year.

“The United States and its allies are looking for defense technology partners that can move

quickly, innovate continuously and deliver systems already proven across theaters of combat,” Plankey said in a statement. “UFORCE is uniquely positioned to meet that demand and we will do that by manufacturing these capabilities in America.”

Said Oleg Rogynskyy, co-founder and CEO of UFORCE: “Sean’s decision to join UFORCE reflects the strength of our platform and the growing recognition that the future of autonomous defense will be shaped by companies able to combine real combat validation with scalable Western deployment,” 

CISA has gone without a permanent director for the entirety of the second Trump administration, and the president has yet to put forward a nominee for the position since Plankey’s withdrawal last month.

Former Oklahoma senator Markwayne Mullin took over as DHS secretary in late March.

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A Chinese cyberespionage group has shifted its gaze back to Europe after years of focusing on other parts of the world, Proofpoint research published Wednesday found.

The surge began in mid-2025, with a bevy of issues bubbling up between China and Europe, the company said. Proofpoint labels the government-linked group TA416, but other companies track it as Twill Typhoon, Mustang Panda or other names.

“This renewed focus most heavily targeted individuals or mailboxes associated with diplomatic missions and delegations to NATO and the EU,” Proofpoint’s Mark Kelly and Georgi Mladenov wrote. “TA416’s return to European government targeting occurred during heightened EU–China tensions over trade, the Russia–Ukraine war, and rare earths exports, and commenced immediately following the 25th EU–China summit.”

Separately, the same group took up targeting the Middle East in March after the start of the conflict in Iran, something it had never been spotted doing before, Proofpoint found.

“This aligns with a trend observed by Proofpoint of some state-aligned threat actors shifting targeting toward Middle Eastern government and diplomatic entities in the aftermath of the war,” the firm said. “This likely reflects an effort to gather regional intelligence on the status, trajectory, and broader geopolitical implications of the conflict.”

TA416 was active in Europe in 2022 and 2023, coinciding with the onset of the Ukraine-Russia war, but stepped away from the continent afterward, according to the researchers. Its focus turned to Southeast Asia, Taiwan and Mongolia for a couple years.

The group’s focus on Europe through early 2026 used a variety of web bug and malware delivery methods, including setting up reconnaissance by dangling lures about Europe sending troops to Greenland. It also included phishing emails about humanitarian concerns, interview requests and collaboration proposals, Proofpoint said.

“During this period, TA416 repeatedly altered its initial infection chains while maintaining a consistent goal of loading the group’s customized PlugX backdoor via DLL sideloading triads,” the researchers wrote.

Proofpoint’s is not the only report of late about Chinese cyberespionage groups targeting Europe, with another focused on LinkedIn solicitations to NATO and European institutions.

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Leaked iOS spyware has some cybersecurity professionals raising urgent alarms about potential mass iPhone compromises, a development that pairs ominously with the recent discovery of two sophisticated iOS exploit kits.

At the same time, some other experts say Apple’s defensive features for iPhones remain elite. But several factors have created unprecedented circumstances: the public accessibility of a version of DarkSword, shortly after the discovery of the original version of DarkSword and the earlier discovery of a similar kit known as  Coruna, and a  growing market for iPhone exploits driven by their high value as targets.

Allan Liska, field chief information security officer at Recorded Future, said he was worried about what the leaked DarkSword version could do to “democratize” iPhone exploits.

“Right now, iPhone exploitations are among the most expensive to research/implement so they have been, largely, the realm of nation-states,” he said. “If anyone can exploit an iPhone, suddenly something that has managed to be relatively secure now is a much bigger attack surface.”

Google, iVerify and Lookout released research last week on DarkSword’s discovery, centered on Ukraine. Google also said it saw targeting in Saudi Arabia, Turkey and Malaysia. And that was before a version turned up on GitHub, a development TechCrunch first reported and Google and iVerify have analyzed. (The week before, iVerify and Google uncovered Coruna. Google declined to comment further for this story.)

“It’s extremely alarming that this leaked out on GitHub,” said Rocky Cole, co-founder of iVerify. “I would assume that it’s being used all around the world, and including here in the United States.”

Hundreds of millions of iPhones running iOS 18 could be vulnerable to DarkSword.

“I think that the top line issues here are pretty clear: people who have devices that are vulnerable should upgrade ASAP,” said Eva Galperin, director of cybersecurity at the Electronic Frontier Foundation. “It is very likely that these vulnerabilities are being used right now to exploit vulnerable devices at scale, which is unusual for Apple products.”

The propagation problem

Coruna was concerning enough for Apple that it took the rare step of backporting security updates to still older versions of iOS, Cole said. The fear, he said, was that it might be wormable — capable of spreading from one device via text message to everyone in a phone’s contact list.

But Cole said Apple hasn’t released similar security-focused updates to iOS 18, for reasons he doesn’t know.

Apple has emphasized the patches it has issued, urged users to update their phones and touted Lockdown Mode as a defense against spyware.

“Apple devices are designed with multiple layers of security in order to protect against a wide range of potential threats, and every day Apple’s security teams around the world work tirelessly to protect users’ devices and data,” said Apple spokesperson Sarah O’Rourke. “Keeping your software up to date is the single most important thing you can do to maintain the security of your Apple products, and devices with updated software were not at risk from these reported attacks.”

IPhones’ widespread use makes them high-value targets, fueling a thriving market for exploits. Coruna and DarkSword are indicators of this growing demand. 

“It’s time for organizations to start thinking of mobile security the way they think about desktop security, which is to say everyone knows how to secure their laptop,” Cole said. And for iPhone exploit hunting in particular, “you’re starting to see people do it at a mass level.” Furthermore, the resale market is such that exploits that once were exclusive are no longer, and AI makes it even easier to customize them in the code, he said. 

DarkSword has drawn federal attention: The Cybersecurity and Infrastructure Security Agency this week added vulnerabilities that DarkSword exploits to the list that federal agencies must patch.

The number of people still using iOS 18 is large, up to 25% of all iPhones. Cole said several factors are contributing to that, such as users being leery of iOS 26’s onboard artificial intelligence or the Liquid Glass interface.

Said Galperin: “There are many reasons why people do not keep their devices up to date, so when I tell people ‘just patch your stuff’ I think it is important to realize that there are circumstances under which this is easier said than done.”

Proven defenses despite expanding risks

Despite the concerns, Cole credited iPhone for its high security standards, in particular for its app store.

For Natalia Krapiva, senior tech-legal counsel at Access Now, a key takeaway is the worrisome proliferation of commercial spyware and cyber intrusion capabilities.

“This is exactly what human rights activists and digital security researchers have been warning governments and companies about: In the absence of effective regulation for the industry, these exploits will get out and end up in the hands of adversaries like Russia, China, Iran, or, as in the case of DarkSword, leaked online for any criminal to use,” she said.

On the other hand, Apple’s Lockdown Mode and Memory Integrity Enforcement are top-notch defensive measures, Krapiva said. We’ve yet to see a Lockdown Mode-enabled iPhone being infected with spyware, she said.

“I think we’ll keep seeing more attempts to exploit both Apple and Android devices as they improve their software and hardware security,” she said. “It’s the old cat-and-mouse game.”

Adam Boynton, senior enterprise strategy manager at Jamf, said what’s happened with Coruna and DarkSword is evidence of Apple’s success.

“What’s encouraging here is that Apple’s security model works,” he said. “Coruna skips devices running the latest iOS versions and avoids those with Lockdown Mode enabled entirely. That’s a strong validation of the defences Apple has built.

“DarkSword reinforces the same principle,” he continued. “Where Coruna targeted older iOS versions, DarkSword demonstrates that even relatively current releases can be targeted by determined actors. Apple moved quickly to patch the vulnerabilities involved, and devices running the latest iOS are protected.”

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Russian intelligence-affiliated hackers have gained access to thousands of users’ messaging apps with a global phishing campaign, the FBI and the Cybersecurity and Infrastructure Security Agency warned in a public service announcement on Friday.

The high-value targets they’re pursuing include current and former U.S. government officials, political figures, military personnel and journalists, the two agencies said in the joint PSA about the hackers’ attempts to infiltrate commercial messaging applications (CMAs).

The U.S. alert comes on the heels of an earlier warning from Dutch authorities, who said last week that Russian hackers were “engaged in a large-scale global attempt” to take over WhatsApp and Signal accounts. The Dutch warning likewise followed a similar warning from Germany in February.

The U.S. agencies emphasized that the hackers had not been able to bypass end-to-end encryption, instead manipulating users into giving up access. The scheme involves hackers posing as Signal help personnel, then inviting them to click a link or provide verification codes or account personal identification number.

“After compromising an account, malicious actors can view the victims’ messages and contact lists, send messages, and conduct additional phishing against other CMA accounts,” the PSA explains. “(Note: reporting shows that the threat actors specifically target Signal accounts but can apply similar methods against other CMAs).”

However, “CMA users who strengthen their personal cybersecurity and defend against social engineering attempts can reduce the risk of account compromise and limit the effectiveness of the threat actors’ current tactics, techniques, and procedures,” the agencies said.

The Russian campaign is just the latest to seek to bypass the protections commercial messaging apps offer. CISA in November warned about spyware targeting of messaging apps. 

There sometimes has been a Russian intelligence nexus to the recent targeting. Google Threat Intelligence Group shined a spotlight last year on Russian attempts to target Signal users in Ukraine.

‘We anticipate the tactics and methods used to target Signal will grow in prevalence in the near-term and proliferate to additional threat actors and regions outside the Ukrainian theater of war,” the company said.

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