Security researchers have revealed a ransomware operation known as Prinz Eugen that employs an unusual file-encryption strategy designed to increase pressure on victims. According to an investigation by ThreatDown, Malwarebytes' enterprise security division, the malware gives priority to files that have been modified most recently, focusing its efforts on data that organizations are most likely to rely on for day-to-day operations.
Researchers describe the actors behind Prinz Eugen as highly interactive intruders who rely on direct involvement throughout the attack process rather than fully automated deployment methods. Instead of depending on large-scale ransomware affiliate networks, the group appears to conduct attacks manually, using legitimate administration tools and built-in system utilities to move through victim environments and maintain access.
Evidence collected during incident response investigations suggests that attackers may initially gain entry through compromised Remote Desktop Protocol (RDP) credentials. After securing access, operators manually retrieve and launch the ransomware payload, identified as servertool.exe. In one investigated intrusion, researchers observed the use of the RemotePC remote management platform, alongside the creation of a backdoor administrator account that allowed the attackers to retain access to the compromised environment.
ThreatDown noted that Prinz Eugen does not currently appear to operate under the ransomware-as-a-service model that has become common across the cybercriminal ecosystem. Researchers found no indication that the group's operators are actively recruiting affiliates or distributing their malware to external partners. Instead, available evidence points to a more centralized operation in which attacks are carried out directly by the threat actors themselves.
Although the group's data-leak platform presently displays only three victims, researchers believe the actual number of affected organizations is higher. Information gathered during investigations indicates that multiple organizations have experienced incidents linked to the ransomware. Depending on the attack, victims may face file encryption, data theft, or a combination of both. Security researchers have identified at least five organizations impacted by the operation, including an incident involving Standard Bank, where attackers reportedly demanded a ransom payment of one Bitcoin. The demand was ultimately rejected.
One of the most distinctive characteristics of Prinz Eugen is its approach to selecting files for encryption. Analysis of the malware revealed that it processes files according to modification time, encrypting the most recently changed data before moving to older content. When several files share the same timestamp, the malware follows alphabetical order to determine which file is processed next.
Researchers believe this strategy is intended to maximize operational disruption. Files that have been edited recently are often associated with ongoing business activities, active projects, financial records, or other information that employees depend on regularly. By rendering this data inaccessible first, attackers can create immediate pressure on organizations to engage with extortion demands.
Technical analysis further showed that the ransomware scans directories recursively without imposing depth restrictions. Unlike some ransomware families that avoid certain locations or system folders, the examined Prinz Eugen sample applies very few limitations. The malware attempts to encrypt virtually every accessible file it encounters, excluding only files that already carry the .prinzeugen extension, which is added to data after encryption has been completed.
The encryption mechanism itself incorporates multiple modern cryptographic components. Researchers found that the ransomware uses the ChaCha20-Poly1305 algorithm together with a 32-byte master key. Each targeted file receives its own randomly generated initialization vector, while key generation and derivation processes rely on Argon2id, SHA-256, and HKDF-SHA256. Data is encrypted in 1 MB segments, and SHA-256 hashing is used to verify file integrity throughout the process.
Investigators also identified a safeguard built into the malware's deletion routine. When operators use the – delete option, the ransomware removes original files only after confirming that the encrypted version can be successfully decrypted. This verification step reduces the likelihood of accidental data destruction that could undermine the attackers' leverage over victims.
Beyond encrypting files, Prinz Eugen incorporates measures intended to frustrate forensic investigations. Researchers observed that the malware overwrites encryption keys with zero values once they are no longer needed, triggers garbage collection routines to remove remaining traces from memory, and then attempts to delete itself from disk. These actions are designed to make post-incident analysis and key recovery efforts more difficult.
Another noteworthy aspect of the ransomware is the absence of conventional extortion artifacts. The analyzed sample contains no functionality for dropping a ransom note onto infected systems, nor does it alter the victim's desktop wallpaper to display payment instructions. While such techniques have historically been common among ransomware groups, ThreatDown researchers noted that some organized operations are increasingly shifting away from visible on-system communications.
Instead, attackers may conduct negotiations through external channels such as email correspondence, direct phone contact, or dedicated dark-web portals. By moving communications outside the compromised environment, threat actors leave behind fewer artifacts that investigators can collect and reduce opportunities for automated security tools to identify the extortion phase of an attack.
To assist defenders, ThreatDown has published a collection of indicators of compromise associated with Prinz Eugen activity. These indicators can help security teams, incident responders, and researchers identify potential infections, investigate suspicious activity, and strengthen defenses against future attacks involving the ransomware.
European law enforcement has dismantled an extensive Dark Web operation that was built to deceive users seeking illegal content and cybercrime services.
According to Europol, a 35-year-old man based in China is suspected of creating a network of 373,000 Dark Web websites. These sites advertised child sexual abuse material and hacking-related services, but investigators found that none of the promised content or access was ever delivered. The entire system was designed to collect payments under false pretenses.
Officials described the takedown as one of the largest actions ever taken against fraudulent platforms operating on the Dark Web.
Further details from Bavarian Police show that the network included 32 platforms claiming to offer child sexual abuse material, distributed across approximately 90,000 .onion domains. In addition, 90 other platforms promoted stolen credit card data and unauthorized access to compromised systems, spread across another 283,000 .onion addresses.
Authorities stressed that these platforms were entirely deceptive. The sites were structured to appear convincing, often displaying previews and organized listings to build trust. In reality, users who made payments received nothing. The operation relied on persuading visitors to transfer money without providing any service in return.
Investigators estimate the suspect generated around $400,000 in revenue by targeting roughly 10,000 customers over several years. Many of the sites offered supposed “packages” of illegal content, described in sizes ranging from gigabytes to terabytes, with payments requested in cryptocurrency.
The investigation began in mid-2021. Since then, authorities have seized 105 servers linked to the network. By tracing cryptocurrency transactions, they were also able to identify 440 individuals who had made payments through the platforms.
The suspect has not been publicly named, but investigators have released a photograph and confirmed that an international arrest warrant has been issued. Authorities found that the operation relied heavily on rented servers located in Germany and had been active since at least 2019.
All identified websites have now been replaced with official seizure notices.
According to Bavarian Police, the scale and structure of the network made it particularly difficult to detect. The suspect replicated 122 variations of platform designs and distributed them across more than 373,000 unique addresses. This created an infrastructure that was widely scattered and complex, making it hard to track using traditional investigative methods.
The case underlines a pattern often seen in underground online ecosystems, where even individuals seeking illicit services can become targets of fraud. The combination of cryptocurrency payments, large-scale site replication, and anonymous hosting allowed the operation to expand quickly while avoiding early detection.
At the same time, the investigation shows how law enforcement agencies are improving their ability to track digital financial flows and dismantle large, distributed networks.
For years, illegal online marketplaces were closely linked to the dark web. These platforms relied on privacy-focused browsers and early cryptocurrencies to sell drugs, weapons, stolen data, and hacking tools while remaining hidden from authorities. At the time, their technical complexity made them difficult to track and dismantle.
That model has now changed drastically. In 2025, some of the largest illegal crypto markets in history are operating openly on Telegram, a mainstream messaging application. According to blockchain intelligence researchers, these platforms no longer depend on sophisticated anonymity tools. Instead, they rely on encrypted chats, repeated channel relaunches after bans, and communication primarily in Chinese.
Analysis shows that Chinese-language scam-focused marketplaces on Telegram have reached an unprecedented scale. While enforcement actions earlier this year temporarily disrupted a few major platforms, activity quickly recovered through successor markets. Two of the largest currently active groups are collectively processing close to two billion dollars in cryptocurrency transactions every month.
These marketplaces function as service hubs for organized scam networks. They provide money-laundering services, sell stolen personal and financial data, host fake investment websites, and offer digital tools designed to assist fraud, including automated impersonation technologies. Researchers have also flagged listings that suggest serious human exploitation, adding to concerns about the broader harm linked to these platforms.
Their rapid growth is closely connected to large-scale crypto investment and romance scams. In these schemes, victims are gradually manipulated into transferring increasing amounts of money to fraudulent platforms. Law enforcement estimates indicate that such scams generate billions of dollars annually, making them the most financially damaging form of cybercrime. Many of these operations are reportedly run from facilities in parts of Southeast Asia where trafficked individuals are forced to carry out fraud under coercive conditions.
Compared with earlier dark web marketplaces, the difference in scale is striking. Previous platforms processed a few billion dollars over several years. By contrast, one major Telegram-based marketplace alone handled tens of billions of dollars in transactions between 2021 and 2025, making it the largest illicit online market ever documented.
Telegram has taken limited enforcement action, removing some large channels following regulatory scrutiny. However, replacement markets have repeatedly emerged, often absorbing users and transaction volumes from banned groups. Public statements from the platform indicate resistance to broad bans, citing privacy concerns and financial freedom for users.
Cryptocurrency infrastructure also plays a critical role in sustaining these markets. Most transactions rely on stablecoins, which allow fast transfers without exposure to price volatility. Analysts note that Tether is the primary stablecoin used across these platforms. Unlike decentralized cryptocurrencies, Tether is issued by a centralized company with the technical ability to freeze funds linked to criminal activity. Despite this capability, researchers observe that large volumes of illicit transactions continue to flow through these markets with limited disruption. Requests for comment sent to Tether regarding its role in these transactions did not receive a response at the time of publication.
Cybercrime experts warn that weak enforcement, fragmented regulation, and inconsistent platform accountability have created conditions where large-scale fraud operates openly. Without coordinated intervention, these markets are expected to continue expanding, increasing risks to users and the global digital economy.
Our world is entirely dependent on technology which are prone to attacks. Only a few people understand such complex infrastructure. The internet is built to be easy, and this makes it vulnerable. The first big cyberattack happened in 1988. That time, not many people knew about it.
The more we rely on networked computer technology, the more we become exposed to attacks and ransomware extortion.
There are various ways of hacking or disrupting a network. Threat actors get direct access through software bugs, they can access unprotected systems and leverage them as a zombie army called "botnet," to disrupt a network.
Currently, we are experiencing a wave of ransomware attacks. First, threat actors hack into a network, they may pretend to be an employee. They do this via phishing emails or social engineering attacks. After this, they increase their access and steal sensitive data for extortion reasons. By this, hackers gain control and assert dominance.
These days, "hypervisor" has become a favourite target. It is a server computer that lets many remote systems to use just one system (like work from home). Hackers then use ransomware to encode data, which makes the entire system unstable and it becomes impossible to restore the data without paying the ransom for a decoding key.
A major reason is a sudden rise in cryptocurrencies. It has made money laundering easier. In 2023, a record $1.1 billion was paid out across the world. Crypto also makes it easier to buy illegal things on the dark web. Another reason is the rise of ransomware as a service (RaaS) groups. This business model has made cyberattacks easier for beginner hackers
RaaS groups market on dark web and go by the names like LockBit, REvil, Hive, and Darkside sell tech support services for ransomware attack. For a monthly fees, they provide a payment portal, encryption softwares, and a standalone leak site for blackmailing the victims, and also assist in ransom negotiations.
The rolling out of IDs means that digital identification will become mandatory for right-to-work checks in the UK by the end of this Parliament session. It aims to stop the illegal migrants from entering the UK, according to Keir Starmer, the UK's Prime Minister, also stressing that the IDs will prevent illegal working.
Experts, however, are not optimistic about this, as cyberattacks on critical national infrastructure, public service providers, and high street chains have surged. They have urged the parliament to ensure security and transparency when launching the new ID card scheme.
According to former UK security and intelligence coordinator and director of GCHQ David Omand, the new plan will offer benefits, but it has to be implemented carefully.
David Omand, former UK security and intelligence coordinator and director of GCHQ, said the scheme could offer enormous benefits, but only if it is implemented securely, as state hackers will try to hack and disrupt.
To prevent this, the system should be made securely, and GCHQ must dedicate time and resources to robust implementation. The digital IDs would be on smartphones in the GOV.UK’s wallet app and verified against a central database of citizens having the right to live and work in the UK.
There is always a risk of stolen data getting leaked on the dark web. According to an investigation by Cyjax, more than 1300 government email-password combinations, addresses, and contact details were accessed by threat actors over the past year. This is what makes the Digital ID card a risk, as the privacy of citizens can be put at risk.
The UK government, however, has ensured that these digital IDs are made with robust security, secured via state-of-the-art encryption and authentication technology.
According to PM Starmer, this offers citizens various benefits like proving their identity online and control over how data is shared and with whom.
Almost 500,000 women in the Netherlands have had their medical information stolen after hackers breached a clinical laboratory responsible for analyzing cervical cancer screening tests. The stolen records, dating from 2022 until now, include names, addresses, dates of birth, social security numbers, test results, and even doctors’ follow-up advice.
The data was taken from Clinical Diagnostics, a lab located in Rijswijk, near The Hague. The breach occurred early last month, but the women involved and the national screening bureau were only informed last week. This delay sparked outrage, as European privacy laws require authorities and affected individuals to be notified within 24 hours of a confirmed data breach.
Bevolkingsonderzoek Nederland (BVO NL), the agency overseeing national cancer screening programs, strongly criticized the lab for failing to alert women sooner. Its chair, Elza den Hertog, described the incident as a “nightmare scenario.” She explained that while the bureau had worked hard to encourage women to take the cervical screening test, those efforts were undermined when participants learned their sensitive medical details had fallen into the hands of cybercriminals.
As a result of the breach, BVO NL has suspended its cooperation with Clinical Diagnostics until the lab can guarantee stronger protections for patient data. Dutch Health Minister Danielle Jansen has also ordered an independent investigation.
Further reports suggest the situation may be even more serious than initially thought. In addition to cervical cancer screenings, other laboratory data — including tests from hospitals such as Leiden University Medical Centre and Amphia may also have been compromised.
The healthcare cybersecurity center, Z-Cert, confirmed that stolen data has already appeared on the dark web, with around 100 megabytes published so far. That portion alone represents more than 50,000 patients’ information. Investigators believe the total stolen data could reach 300 gigabytes.
According to local media, a cybercriminal group known as "Nova" has claimed responsibility for the attack. Reports also suggest that the lab’s parent company, Eurofins Scientific, may have paid a ransom worth millions of euros in an attempt to prevent the release of the stolen files, though this has not been officially confirmed.
Authorities are urging affected women to remain alert to possible fraud. Stolen personal details can be misused for scams, phishing attempts, or identity theft. Officials advise patients not to share information with unknown callers, avoid clicking suspicious links, and treat unusual messages with caution.
“This incident shows just how damaging cyberattacks can be when they target critical healthcare services,” den Hertog said. “Our focus now must be on restoring trust, supporting patients, and preventing this from ever happening again.”
Cybersecurity experts from Semperis say that over the past year, in 40% of ransomware attacks, the CEOs of the victim company were physically attacked, which is particularly prevalent in US-based organizations, at 46%.
However, even paying the attackers is not enough. The research revealed that over 55% of businesses that paid a ransom had to do so multiple times, with around 29% of those firms paying three or more times, and 15% didn’t even receive decryption keys, while in a few cases, they received corrupted keys.
Blackmailing to file a regulatory complaint is also a famous tactic, Semperis said. It was found in 47% of attacks, increasing to 58% in the US.
In 2023, the notorious BlackCat ransomware gang reported one of its victims to the Securities and Exchange Commission (SEC) to make them pay. This was done because the SEC requires organizations to report about a cybersecurity incident if there is a breach, which includes the SEC's four-day disclosure rule for publicly traded businesses.
Ransomware attacks have threatened businesses and the cybersecurity industry for decades, constantly evolving and outsmarting security professionals. The attacks started with encryption, but the companies started mitigating by having offline backups of all the important data.
Ransomware actors then turned to stealing data and blackmailing to leak it on the web if the ransom was not paid. Known as “double extortion,” the technique works really well. Some threat actors even dropped the encryption part totally and now focus on stealing files. But many companies still don’t cave in, forcing cybercriminals to go to extreme lengths.
In a few cases, the attackers combine the encryption of the back-end with a DDoS on the front-end, stopping the business entirely. Semperis CEO Mickey Bresman said that while some “circumstances might leave the company in a non-choice situation, we should acknowledge that it's a down payment on the next attack.”
"Every dollar handed to ransomware gangs fuels their criminal economy, incentivizing them to strike again. The only real way to break the ransomware scourge is to invest in resilience, creating an option to not pay ransom," he commented.
One of the most chilling reminders of how threat landscapes are evolving even to the most fortified sectors is a major cyber breach that has hit the core of France’s naval defence ecosystem, the Naval Group. Naval Group—widely regarded as one of the nation’s key innovators in the maritime industry—has been compromised by a calculated cyberattack that compromised its reputation for operational secrecy.
Almost 13 gigabytes of highly sensitive data, including technical documentation, submarine combat software components, internal communications, as well as decades-old audio recordings from submarine monitoring systems, were discovered on the internet. It was discovered that virtual machine containers, detailed architecture schematics, and proprietary system blueprints belonging to Naval Group engineers were found in the leak, as well as virtual machine containers.
A silent and strategic adversary was responsible for the intrusion, as it lacked digital vandalism or extortion demands. In spite of the fact that attribution is still unclear, there is speculation that nation-state actors could have been involved in espionage as well as independent threat groups that were seeking disruption or strategic leverage.
However, what remains undeniable is the scale and intent of the breach. This was a precise attack against an impenetrable defence network that was once considered impenetrable and unbreakable. Adding to the fragility of national defence and digital security, French naval defence contractor Naval Group has been the target of scrutiny after claims of a significant cyberattack that have raised concerns about the company's operations.
An anonymous group operating on the dark web, known as the Black Web forum, has claimed it has accessed and exfiltrated classified information related to key French naval platforms, including the nuclear-powered submarines of the Barracuda class. A month ago, the group released approximately 30 gigabytes of data, including software code from combat management systems, and issued a demand that they be contacted within 72 hours or risk leaking more information.
Despite the fact that the authenticity of these files is still uncertain, cybersecurity experts warn that even partial exposure to such sensitive source code could allow adversaries to gain valuable insight into the performance of weapons, their system architecture, and any vulnerabilities they may be able to exploit. It has been confirmed that Naval Group, owned by the French government in the majority, has begun an urgent technical investigation into the alleged breach.
In response to the incident, the company spokesperson described it as a PR attack rather than a confirmed intrusion into its internal infrastructure, stating that operations across shipyards and naval projects remain undisturbed. However, the strategic implications of this incident remain significant. With the creation of some of France's most advanced maritime defence assets, including the Charles de Gaulle aircraft carrier and the Triomphant submarines, Navy Group has played a crucial role in the nation's defence and that of allies.
The potential impact of a confirmed compromise could include both the threat to homeland security as well as the threat to international trade agreements between Australia, India, and Brazil. The Ministry of Armed Forces has yet to release a statement on the matter, but it has been reported that French cybersecurity agencies are helping to conduct the forensic analysis. In light of increasing concerns about global security in the defense supply chain, Naval Group has issued a formal statement stating that no intrusion has yet been detected on its internal information technology infrastructure, as of yet.
In a statement, the company announced that all of its resources had been mobilised to investigate whether the recently leaked data are authentic, provenance, or owned by the Indian Navy, as they had partnered with Mazagon Dock Shipbuilders to deliver six Scorpene-class submarines to the Indian Navy. In order to conduct the forensic investigation, we are collaborating with French authorities.
A similar incident occurred in 2016, when more than 22,000 classified pages of India's Scorpene submarines were leaked, raising serious concerns over the integrity of India's underwater warfare capabilities, a breach that has echoed this recent incident.
A recent breach could have far-reaching implications, as well as threaten the operational security of other nations that operate Scorpene-class submarines, such as Malaysia, Indonesia, and Chile, if it is verified. According to analysts, such a compromise would have a devastating effect on the international defence manufacturing ecosystem, undermining trust in the protection of military technologies and exposing transnational arms collaborations to systemic vulnerabilities.
Geopolitical tensions are increasingly raging in grey zone conflict - a territory where cyberattacks and information warfare blur the line between peace and hostility, as global defence contractors are becoming very valuable targets. The Naval Group is a cornerstone of France's naval industrial base and is now found at the nexus of this strategic vulnerability.
In addition to providing advanced maritime platforms worldwide to nations like France, France's Nuclear Attack submarines (SSNs) and the Scorpene-class diesel-electric submarines (SSKs) in service with the Indonesian Navy, the company is also a major supplier of advanced military systems. There are also multipurpose French-Italian frigates, the FREMM, which are based in France.
In addition to serving as a technological leader and economic engine, Naval Group also supports tens of thousands of indirect jobs in France since 90% of its added value is generated within the country. The ownership structure of the company further reflects its national significance as well. 62.25 per cent of the company's shareholdings are held by the French state, 35 per cent by Thales, and the rest by its former employees through structured corporate shareholdings.
As strategic autonomy becomes increasingly important in a world where defence is regarded as an important component of economic growth, entities such as Naval Group symbolise more than just the capability to defend oneself; they represent a nation's industrial and strategic sovereignty in an era when strategic autonomy is increasingly emphasised.
In spite of a growing number of high-profile cyber intrusions that target both corporations and governments, the allegations of a breach involving Naval Group are yet another disturbing global trend. Days before, Microsoft disclosed a critical vulnerability in its widely used SharePoint platform, which is believed to have been exploited by Chinese threat actors to gain access to this platform.
Among the affected entities was the U.S. It is the responsibility of the National Nuclear Security Administration to maintain the American nuclear arsenal. This incident did not compromise any classified information, however the growing frequency and ambition of such attacks have raised alarm within international security communities because of the increased frequency and ambition.
With a workforce of more than 15,000 and generating revenue over €4.4 billion annually, Naval Group stands out as one of the world’s leading naval shipbuilders in an increasingly volatile threat landscape. It is an essential industrial asset for the government as a whole. Almost two-thirds of the company is controlled by the French government (holding nearly two-thirds of the equity), and the remainder is controlled by Thales, one of the leading defence conglomerates in the country.
It is not only the incident that has raised concerns about cyber-vulnerabilities within critical infrastructure, but it also emphasises the importance of coordinating resilient strategies across global defence supply chains to reduce the risk of a cyber attack. This incident involving Naval Group happens to fall at a critical moment in the global cybersecurity landscape, as the digital battlefield has become as important as traditional combat zones in terms of importance.
Despite the fact that governments and private companies invest billions in safeguarding technological superiority, the threat of real or perceived exposure of sensitive defence assets is amplifying strategic fears. The reputational and diplomatic fallout for France might be substantial, especially if defence partners start questioning the ability of collaborative programs to survive.
A key concern about the breach is that it has the potential to have a ripple effect: it strikes at the intersection of national security, industrial sovereignty, and global defence cooperation. As a consequence of Naval Group's integral role in multinational defence programs, any compromise could negatively impact not only France but also all of the nations which rely on its software frameworks and platforms.
It is becoming increasingly clear that in an era dominated by digitally enabled espionage, where classified data can be weaponised both for disruption and to provide intelligence, the protection of defence research and development is no longer a siloed responsibility, but rather a shared imperative across allies and defence ecosystems.
Aside from that, this breach serves as a stark reminder that cyber intrusions don't necessarily show up in the form of ransomware or defacing websites. There were motives underlying the leak in this case that were geopolitical manoeuvres, competitive sabotage, or intelligence collection, based on the absence of financial extortion and the precision of the leak. Therefore, the Naval Group episode should serve as a call to action for the broader defence community, emphasising the urgent need for robust, coordinated cybersecurity defences, cross-border intelligence sharing, and a renewed commitment to both legacy systems and new defence technologies that are being developed.
The Naval Group breach, which occurred in a high-stakes theatre of modern security where digital compromises could undermine years of strategic advantage, goes way beyond just an isolated incident in a theatre with high stakes. It represents not only the vulnerability of defence digitisation and the fragility of strategic partnerships, but also the persistent threats posed by adversaries operating in the shadows that exist today.