Cybercriminals are targeting Steam users through fraudulent troubleshooting posts that exploit the increasingly common ClickFix social engineering technique, tricking gamers into manually executing malicious PowerShell commands that ultimately install cryptocurrency mining malware on Windows systems.
Rather than relying on software vulnerabilities, the campaign abuses trust within Steam's community discussion forums. Attackers reportedly create newly registered accounts and respond to users seeking help with problems such as game crashes, missing inventory items, or other technical issues. Their replies appear to offer legitimate troubleshooting steps, encouraging victims to launch Windows PowerShell with administrator privileges and paste a command that supposedly resolves the issue.
Instead of fixing the reported problem, the command downloads and installs XMRig, an open-source cryptocurrency mining application that has frequently been repurposed by cybercriminals to mine Monero using victims' computing resources without their knowledge or consent.
The campaign reflects the continued rise of ClickFix attacks, a social engineering method that persuades users to execute malicious commands themselves. These attacks typically imitate security checks, CAPTCHA verifications, software updates, or troubleshooting instructions that appear credible because they are presented as solutions to an existing problem. Since the victim willingly launches the command, the activity may evade security controls designed to block automatically executed malware.
The PowerShell script distributed in this campaign disguises itself as a Windows optimisation utility named "msf utility \ PC Opt." Once started, it displays what appear to be routine maintenance operations, including cleaning temporary files, flushing the DNS cache, updating drivers, checking disk health, disabling unnecessary startup applications, scanning for malware, repairing the Windows image, and running the System File Checker.
However, these operations largely serve as a visual distraction. Instead of performing meaningful system maintenance, the script displays convincing progress messages and introduces short delays to create the impression that legitimate optimisation tasks are taking place while malicious actions occur in the background.
The script's primary malicious routine first disables Transport Layer Security (TLS) certificate validation before confirming that it has been launched with administrator privileges. If elevated permissions are unavailable, execution stops after displaying an error requesting administrative access.
Once running with the required privileges, the malware establishes persistence by creating a directory within the Windows installation path and modifying Microsoft Defender settings to exclude that location from antivirus scanning. Excluding a directory from security scans reduces the likelihood that the installed malware will be detected or quarantined.
The script also checks for traces of previous installations by attempting to stop an existing scheduled task associated with the miner, terminating related processes, and removing older configuration files. While the exact purpose of this cleanup remains uncertain, it may help replace an earlier installation or remove conflicting miner components before deploying a fresh payload.
To retrieve the malware, the script temporarily creates an outbound Windows Firewall rule permitting network communication with an attacker-controlled server over TCP port 443. After downloading the payload, it verifies that the retrieved file is both non-empty and a valid executable before moving it into its final installation directory.
To maintain long-term access, the malware creates a scheduled Windows task configured to launch the XMRig executable automatically whenever the operating system starts. The task executes with SYSTEM privileges, giving the miner elevated permissions while allowing it to continue operating after reboots.
XMRig itself is a legitimate open-source cryptocurrency miner designed for authorised mining operations. However, threat actors frequently misuse the software in cryptojacking campaigns because it efficiently mines the privacy-focused cryptocurrency Monero, allowing attackers to generate revenue by exploiting compromised computers' CPU resources. Victims often experience unusually high processor usage, increased power consumption, system slowdowns, excessive fan activity, and reduced hardware lifespan.
This indicates a new wave in cybercriminal tactics. Rather than exploiting software flaws, attackers increasingly rely on convincing users to compromise their own systems through social engineering. ClickFix campaigns have been observed across multiple platforms in recent months, targeting individuals through fake browser alerts, fraudulent technical support pages, counterfeit software updates, and deceptive verification prompts.
Users should exercise caution when following technical advice posted by unknown forum members, particularly when instructions require launching PowerShell, Command Prompt, or other administrative tools. Legitimate game support rarely requires manually executing complex commands obtained from public discussion forums.
Systems that may have been exposed should be examined for unexpected scheduled tasks related to XMRig, suspicious Microsoft Defender exclusions, and unfamiliar files or folders created within protected Windows directories. A full antivirus scan should be performed immediately, and any malicious scheduled tasks, Defender exclusions, or installed payloads should be removed. Where compromise cannot be confidently ruled out, performing a complete operating system reinstallation may provide the most reliable method of restoring system integrity, as additional malicious activity may have occurred after the initial infection.
The US Department of the Treasury's Office of Foreign Assets Control (OFAC) has imposed sanctions on a virtual private network (VPN) provider, its administrator and a Belarusian malware service operator, accusing them of supplying infrastructure and tools that helped ransomware groups carry out attacks against organisations across the United States.
The sanctions target First VPN Service (1VPNS), its administrator Dmytro Rashevskyi, and Belarusian national Yegeniy Vladimirovich Silayev. US officials say the three played key roles in supporting the wider ransomware ecosystem by providing services that allowed threat actors to conceal their identities, evade security tools and sustain cybercriminal operations.
According to the Treasury Department, 1VPNS has been operating since 2014 and openly marketed its services on cybercrime forums frequented by ransomware operators and other malicious actors. The VPN provider reportedly promoted a strict no-logs policy, claiming it did not retain records of users' online activity or identities and would not cooperate with law enforcement requests. Investigators allege these assurances made the service particularly attractive to cybercriminals seeking to obscure their activities.
Authorities also accuse Rashevskyi of using fraudulent identities, including the aliases "Maksim Sorin" and "Roman Chabanenko," to obtain internet infrastructure from service providers that would otherwise have declined to host the operation because of repeated abuse complaints. Officials say the use of false identities enabled the VPN service to continue operating despite growing scrutiny from infrastructure providers.
The sanctions follow a multinational law enforcement operation that dismantled 1VPNS earlier this year. In May, European authorities, working alongside the FBI's Boston Field Office, seized the service's website and infrastructure as part of Operation Saffron, a coordinated investigation led by French and Dutch law enforcement agencies.
The investigation into 1VPNS began in December 2021, when authorities successfully infiltrated the VPN provider's infrastructure. Investigators quietly gathered intelligence, including access to the service's customer database, before ultimately dismantling the operation after several years of surveillance and evidence collection.
During the coordinated enforcement action, authorities seized 33 servers spread across 27 countries, arrested the service's administrator and identified thousands of users allegedly linked to ransomware operations, online fraud and other forms of cybercrime. Europol previously stated that 1VPNS had appeared in nearly every major cybercrime investigation it supported, underscoring the service's alleged role within the broader cybercriminal ecosystem.
US officials said organisations affected by ransomware attacks involving infrastructure provided by 1VPNS included businesses, hospitals, financial institutions and municipal governments. These sectors have increasingly become frequent targets of ransomware campaigns because operational disruption often places significant pressure on victims to pay extortion demands.
In a separate but related action, OFAC also sanctioned Silayev for allegedly developing and selling cryptors, also known as crypters, to cybercriminals. Cryptors are specialised software tools designed to modify malware so that it appears different to security products, making malicious code significantly harder for antivirus software and endpoint detection systems to identify. While cryptors do not carry out attacks themselves, they are widely used to help ransomware and other malware bypass detection during deployment.
The Treasury Department estimates that ransomware operations using services provided by 1VPNS and malware protected by Silayev's cryptors have collectively contributed to billions of dollars in losses suffered by US businesses and operators of critical infrastructure.
In announcing the sanctions, State Department spokesperson Thomas Pigott said the designated individuals supplied ransomware groups with services that concealed their identities, disguised malicious software and helped attackers avoid detection, ultimately enabling campaigns responsible for billions of dollars in damages. Pigott added that the United States and its international partners are increasingly focusing not only on ransomware operators themselves but also on the infrastructure providers and service suppliers that make these attacks possible.
The sanctions were coordinated with the United Kingdom's Foreign, Commonwealth and Development Office as part of a broader international effort to disrupt cybercriminal networks. Under OFAC sanctions, any property or financial interests belonging to the designated individuals or entities that fall under US jurisdiction are blocked. In addition, US individuals and organisations are generally prohibited from engaging in transactions involving the sanctioned parties.
The action forms part of a wider strategy aimed at disrupting the ransomware supply chain by targeting the businesses and technical service providers that support cybercriminal operations. Rather than focusing exclusively on the attackers who deploy ransomware, governments are increasingly using financial sanctions, infrastructure seizures and international law enforcement cooperation to dismantle the broader ecosystem that enables these campaigns.
The sanctions were announced as the European Union and the United Kingdom also introduced coordinated sanctions against dozens of Russian individuals and entities accused of supporting a network of hacking groups responsible for cyberattacks across Europe, reflecting continued international efforts to increase pressure on organisations and individuals believed to facilitate malicious cyber activity.
Canada's federal banking regulator has privately warned financial institutions that advances in frontier artificial intelligence are shrinking the time available to detect and contain software vulnerabilities, according to an internal email that specifically identified Anthropic's Claude Mythos, an uncommon move for a regulator that typically avoids naming individual technologies.
The email, sent on April 29 by the Office of the Superintendent of Financial Institutions (OSFI), was addressed to chief technology officers, chief information security officers and chief risk officers at federally regulated banks and insurance companies. Obtained by Reuters through Canada's Access to Information Act, the communication described advanced AI models such as Anthropic's Claude Mythos as accelerating the pace at which cyber risks can emerge, prompting institutions to strengthen the speed of risk identification, mitigation and incident response.
Unlike most regulatory guidance, which generally refers to broad categories such as generative AI or emerging technologies, the OSFI email explicitly referenced Claude Mythos by name. Financial regulators typically adopt technology-neutral language to ensure guidance remains applicable as technologies evolve, making the direct reference to a specific frontier AI model particularly notable.
According to the released correspondence, OSFI warned that advanced AI systems are compressing the timeframe available for organizations to respond to newly identified vulnerabilities before they can be exploited. The regulator indicated that the bulletin accompanying the email outlined sound practices that federally regulated financial institutions could adopt to improve the speed and effectiveness of identifying, mitigating and responding to cyber risks.
However, portions of the document released under Canada's Access to Information Act were redacted, leaving many of the regulator's recommended practices undisclosed. While the details of the guidance remain partially withheld, the available sections reveal OSFI's assessment that rapidly advancing AI capabilities are challenging long-standing assumptions underpinning vulnerability management.
For decades, many cybersecurity programs have operated on the expectation that defenders would have days or even weeks to evaluate newly disclosed vulnerabilities, test patches and deploy mitigations before attackers developed reliable exploits. Frontier AI models capable of rapidly analyzing software code and identifying exploitable weaknesses could substantially reduce that window, increasing pressure on organizations to accelerate patch management and defensive operations.
The concern is particularly relevant for financial institutions, many of which continue to operate complex legacy infrastructure supporting critical banking services. Core banking platforms often consist of decades-old software integrated with newer digital systems, making security updates and vulnerability remediation significantly more complex than in less regulated technology environments. A shorter interval between vulnerability discovery and exploitation therefore presents operational challenges for institutions responsible for maintaining highly available financial services.
Claude Mythos has drawn attention within the cybersecurity community for its reported ability to assist with sophisticated vulnerability research and exploit development in controlled environments. Anthropic introduced the model through Project Glasswing, a restricted-access initiative designed to provide selected organizations with advanced cybersecurity capabilities for defensive research rather than broad public deployment. Access to the model remains limited and subject to eligibility requirements established by Anthropic.
The timing of OSFI's communication coincided with a series of regulatory discussions surrounding frontier AI models. Earlier in April, senior executives from Canadian banks reportedly met with regulators to discuss the implications of Claude Mythos. Around the same period, U.S. Treasury Secretary Scott Bessent and then-Federal Reserve Chair Jerome Powell also convened bank chief executives to examine the potential cybersecurity implications associated with increasingly capable AI systems.
International regulators have since demonstrated similar interest. Authorities at the European Central Bank and the Bank of England have reportedly discussed the implications of frontier AI for financial sector resilience, while Australia's corporate regulator, the Australian Securities and Investments Commission (ASIC), has confirmed that it is monitoring developments related to the technology.
Following questions from Reuters regarding the internal email, OSFI subsequently published a public bulletin addressing the governance of generative and agentic artificial intelligence. The regulator reiterated that its supervisory approach focuses on how federally regulated financial institutions identify, govern and manage risks arising from AI adoption rather than regulating individual AI models themselves.
"Our focus is not the technology itself, but how federally regulated financial institutions govern and manage the risks associated with its use," OSFI said in its public statement.
Nevertheless, the regulator's internal correspondence referred to Anthropic's Claude Mythos by name on multiple occasions, distinguishing it from the more general language typically used in regulatory communications concerning emerging technologies.
OSFI oversees Canada's federally regulated banks, insurance companies and pension plans, with responsibilities that include monitoring financial stability risks arising from cybersecurity, foreign interference, geopolitical developments and technological change. The emergence of highly capable AI models has increasingly placed these categories of risk in closer alignment as governments evaluate both the opportunities and security implications associated with frontier AI.
While the Canadian government has confirmed that it has access to Claude Mythos, it remains unclear whether any of Canada's major financial institutions currently participate in Anthropic's controlled-access Project Glasswing program. Several banks declined to comment publicly on whether they have access to the model, referring questions instead to the Canadian Bankers Association.
In response, the Canadian Bankers Association said member institutions have invested substantially in protecting Canada's financial system and continue to comply with OSFI's cybersecurity risk management and incident reporting requirements, without addressing whether banks currently have access to the frontier AI model.
At the same time, Canada's largest banks continue expanding their AI strategies across customer services, internal operations and software development. Royal Bank of Canada, TD Bank and Bank of Montreal have outlined initiatives aimed at integrating AI into business operations while reducing reliance on external technology vendors. Scotiabank, CIBC and National Bank have also disclosed AI-related programs intended to improve operational efficiency and customer services.
Bruce Ross, Royal Bank of Canada's Group Head of Artificial Intelligence, said in June that models such as Claude Mythos are changing the cyber threat environment by enabling exploit code to emerge much sooner after vulnerabilities are discovered. He said the bank's response has focused on strengthening AI-powered defensive capabilities to counter increasingly sophisticated attacks.
Anthropic has also expanded Project Glasswing in recent months, reporting that participating organizations have collectively identified more than 10,000 high- and critical-severity software vulnerabilities using the platform's advanced cybersecurity capabilities. The company has positioned the initiative as a defensive research program intended to improve software security while maintaining controlled access to highly capable AI systems.