Article
Suspected North Korean Actors Pull off the Largest Crypto Heist in History
Arete Analysis
Threat Actors

On February 21st, 2025, approximately $1.4 billion USD in Ethereum was stolen from cryptocurrency exchange Bybit. Ethereum held a price of $2600 per token as of February 21st and is one of many cryptocurrencies the exchange holds. Some quick division shows that at least 500,000 Ethereum coins were stolen, making this the largest crypto heist to date in value. Both TRM Labs and Chainalysis have assessed the threat actor to be associated with North Korea with high confidence due to an overlap in crypto wallets tracked as belonging to North Korea.
What’s notable and unique?
North Korea has a long history of financial fraud, money laundering, and other illicit activity. Members of the Democratic People’s Republic of Korea (DPRK) military regularly participate in illicit activities, including remote worker fraud, cryptocurrency hijacking and mining, money mules, wire fraud, and even ransomware. These cybercriminal activities allow DPRK to bypass international sanctions to raise funds for their military.
The threat actors compromised one of Bybit’s offline cold wallets, digital wallets that store private keys needed to access other cryptocurrency wallets completely offline. Due to the wallet being disconnected from the internet, the most likely sources of the compromise were a supply chain attack, insider threat, or a private key compromise.
The alleged North Korean threat actors may not be able to fully monetize the theft. The funds must now be laundered before being taken out at another exchange, as most of the initial wallets to which funds were transferred have been marked as having stolen funds on legitimate cryptocurrency exchanges. The laundering will likely be a two-step process. First, the funds will be exchanged for a native cryptocurrency, such as Ether or BTC, as it is difficult to track stolen funds across cryptocurrency blockchain transfers. Next, the actors will attempt to cover their tracks further by layering the funds to throw investigators off their trail. Shortly after the compromise the actor used 50 wallets and placed 10,000 coins in each, further supporting the alleged theft of 500,000 coins in total.
Bybit has offered a 10% bounty on the stolen coins, leading to a potential purse of $140 million. So far, $42.89 million of the stolen funds have been frozen. However, it is unclear whether this is the work of bounty hunters, law enforcement, or Bybit.
Conclusion
While crypto-related attacks may seem like a new concept at face value, this is the most recent heist in a string traversing ten years. In 2024 alone, North Korean threat actors were associated with $1.5 billion out of $2.2 billion in theft. With North Korea conducting these thefts, the funds enter a broader cybercriminal ecosystem, increasingly invading the insurance ecosystem. Most recently, these threats have expanded into North Koreans fraudulently joining North American and European companies, stealing their source code, and then extorting the companies. Funds stolen in cryptocurrency thefts like the Bybit thefts are funding infrastructure supporting this increasingly stealthy form of extortion, consequently resulting in funds supporting the North Korean military.
Fortunately, as threat actors and money launderers strengthen their ability to hide stolen money, blockchain analytic techniques and toolsets have also evolved. Often, the best way to prevent crypto heists and cybercrime is to implement sound security principles, including password management, vulnerability patching, and end user training.
Sources
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Article
Europol Disrupts AudiA6 Crypto Laundering Service
European authorities have dismantled AudiA6, a major cryptocurrency laundering service linked to ransomware groups and broader cybercriminal networks. Between 2022 and 2025, the platform is believed to have processed over €336 million in illicit funds, enabling threat actors to obscure financial trails and monetize cybercrime proceeds. Its operators are also suspected of running Dark2Web, a dark web forum that facilitated collaboration, services, and connections among cybercriminals globally. This development underscores the expanding role of sophisticated, large-scale cryptocurrency laundering services in sustaining the cybercrime economy, enabling threat actors to obscure illicit funds and evade regulatory controls.
What’s Notable and Unique
Following law enforcement disruption of Cryptex and Garantex, AudiA6 emerged as another platform involved in financial activities linked to ransomware groups. Investigators believe that AudiA6 became a central hub for cybercriminals seeking to launder stolen digital assets while obscuring the transaction trail from authorities.
On June 10, 2026, a coordinated operation resulted in two arrests in Georgia, the dismantling of key infrastructure (30+ servers, 25 domains), the freezing or seizure of over €778,000 in crypto, and the takedown of the AudiA6 and Dark2Web platforms.
Analyst Comments
Ransomware groups and cybercriminal networks are increasingly leveraging sophisticated techniques, including chain-hopping, decentralized exchanges, and mixer-as-a-service platforms, to rapidly move illicit cryptocurrency across multiple blockchains, effectively obscuring transaction trails. Concurrently, the widespread use of fraudulent exchange accounts, mule wallets, and privacy-enhancing tools has elevated cryptocurrency laundering to a core enabler of the cybercrime ecosystem, allowing actors to bypass anti-money-laundering controls at scale. This investigation identified over 6,000 KYC records linked to money-mule accounts, many of which were tied to Russian-speaking intermediaries specifically recruited to facilitate the movement of illicit proceeds. These threat actors systematically used both commercial and domain-controlled email services to establish mule accounts across multiple cryptocurrency platforms. Collectively, these findings underscore the growing scale, coordination, and professionalization of cryptocurrency-enabled crime, highlighting the critical need for sustained, intelligence-led, and internationally coordinated efforts to disrupt these evolving financial ecosystems.
Sources
Ransomware gangs cut off from EUR 336 million ‘AudiA6’ crypto laundering pipeline
Article
Threat Actors Leverage AI for EDR Evasion
A threat actor has developed and deployed a ransomware attack toolkit enhanced with AI-assisted development workflows, enabling automated Active Directory (AD) discovery and improved EDR evasion capabilities. The toolkit leverages agent-based AI systems, such as Claude’s Opus and Cursor agents, for iterative malware development, testing, and refinement.
What’s Notable and Unique
Researchers have highlighted that this toolkit can not only generate ransomware code but also bypass sophisticated security defenses and identify AD networks for malware distribution.
The framework incorporates multiple capabilities, including automated AD discovery and reconnaissance mechanisms, iterative EDR testing environments to refine evasion techniques, and a command-and-control (C2) infrastructure that leverages Telegram APIs and Cloudflare redirectors for stealth.
Additionally, some agents were tasked with checking security research and technical posts for various bypass techniques. The agents recognized what was required for reproduction, extracted the techniques, mapped them to the MITRE ATT&CK knowledge base of adversary behaviors, set up a test lab, carried out the methodology, and reported the results.
After a few repetitions, the modules seemed to avoid nearly all EDR solutions, despite the agent’s initial suggestion of a high failure rate. Although researchers found no evidence that AI was embedded in deployed malware or was operating independently in victim environments, the technology was still used to accelerate the iterative process of developing, testing, and refining payloads against security products, shortening the period between the publication of offensive security research and its practical implementation by threat actors.
Analyst Comments
AI-driven tools like this could accelerate the pace and sophistication of ransomware attacks, enabling even relatively inexperienced actors to launch high-impact campaigns. This development underscores the urgent need for security solutions to adapt to AI-assisted threats. Organizations must respond by strengthening detection engineering, improving visibility across environments, and maintaining robust security fundamentals.
Sources
AI-built ransomware toolkit automates EDR evasion, AD discovery
Pointing a Cursor at evading detection
Article
Arete's 2026 Q1 Crimeware Report
Harness Arete’s unique data and expertise on extortion and ransomware to inform your response to the evolving threat landscape.
Article
CMS Vulnerability Leads to ClickFix Campaign
Threat actors compromised at least 700 education and technology websites in a recent ClickFix campaign by exploiting a critical SQL injection flaw (CVE-2026-26980) in the Ghost content management system (CMS). Adversaries combined the vulnerability with the ClickFix social engineering tactic to steal admin keys and inject a malicious JavaScript that delivers a fake Cloudflare or CAPTCHA verification pop-up, tricking victims into copying and pasting a malicious command into their systems.
What’s Notable and Unique
Rather than targeting the end user first, this campaign is unique in its initial exploitation of the system, followed by social engineering attempts. This hybrid attack style is likely being leveraged to bypass traditional defenses.
This recent campaign also highlights how trusted web properties can be weaponized at scale and coupled with unpatched CMS vulnerabilities. Rather than using the CMS compromise to perpetrate a single attack, threat actors turned it into a supply-chain attack that ultimately affected over 700 trusted websites.
Analyst Comments
As network defenders and their tools enhance threat detection capabilities, adversaries increasingly seek methods to bypass these defenses. By combining vulnerability exploitation, social engineering techniques, and staging for ancillary attacks, this campaign successfully bypassed traditional defenses and inflicted significant impact. Defending against hybrid cyberattacks requires comprehensive security controls beyond simply patching vulnerabilities. Organizations should focus on limiting movement within the environment, detecting abuse of trusted applications, and preventing end-user manipulation.
Sources
700+ education and tech websites hijacked in huge ClickFix malware campaign
Under the engineering hood: Why Malwarebytes chose WordPress as its CMS
Think before you Click(Fix): Analyzing the ClickFix social engineering technique
Ghost CMS Vulnerability Exploited to Infect 700 Sites With ClickFix Malware



