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China has provided insights into the conviction of Zhao Dong, the influential crypto over-the-counter (OTC) trader and widely known founder of the RenrenBit crypto trading desk. The ‘OTC King’Last Wednesday, China’s Supreme Procuratorate disclosed that Zhao, known as the "OTC King," was handed down a substantial prison sentence for engaging in illegal foreign exchange and crypto business operations. The case is emblematic of China's persistent efforts to clamp down on cryptocurrency trading, even when conducted through less transparent channels like OTC desks, private chat groups and stablecoins.Photo by Hanson Lu on UnsplashTracing fundsIn their comprehensive disclosure, the Chinese authorities outlined the meticulous investigation that led to Zhao Dong's conviction. The focus was on tracing fund movements across Chinese bank accounts, overseas cash pools and the circulation of Tether and Bitcoin. Investigators honed in on accounts associated with Zhao Dong and the chat groups used for trading activities. Their arsenal included detailed bank records, WeChat conversations, testimonies from Zhao's OTC agents and other documentary evidence. The report highlighted that all defendants, including Zhao Dong, confessed to the process of collecting dirhams in cash in Dubai, paying RMB to the other party's designated account, buying Tether with dirhams, and allowing the domestic gang to illegally sell it back for RMB. Seven year sentenceIn one of the alleged schemes, Zhao Dong purportedly orchestrated crypto-fiat trades between Dubai-based entities holding cash piles in United Arab Emirates (UAE) dirhams and Chinese contacts within the country. With numerous related recipients confirming that the funds Zhao received were payments from foreigners, the prosecution's case was made so much stronger. Zhao unsuccessfully argued during three public court hearings that his actions constituted digital currency transactions and not a breach of foreign exchange laws. The prosecution countered with evidence from the group's chat records, emphasizing the nature of foreign exchange in their dealings. The court ultimately rendered a verdict, sentencing Zhao Dong to seven years in prison and imposing a 2.3 million Chinese yuan ($325,000) fine. This conviction serves as a stark reminder of the stringent regulatory stance that China has adopted towards cryptocurrency trading. Zhao Dong was considered one of China's most influential OTC crypto traders. He was a Bitfinex shareholder and founder of the D Fund venture capital fund. He established RenrenBit in August 2018, incorporating the company in Singapore. The influential crypto trader is also believed to have been involved in assisting stablecoin-issuer Tether to launch its Tether Yuan product. However, once the authorities moved against him, RenrenBit was taken offline while Tether scrapped its pursuit of Tether Yuan. Despite his influence, Zhao has ultimately become a symbol of the government's commitment to curbing such crypto trading activities within mainland China. The outcome underscores the severity of China's regulatory crackdown on cryptocurrency trading and sends a strong message to other players in the crypto space within the country.

Akira ransomware, responsible for stealing $42 million from over 250 organizations across North America, Europe and Australia in just a year, is now targeting businesses in Singapore. In response, Singaporean authorities have issued a joint advisory warning local businesses about the increasing threat posed by a variant of this ransomware.Photo by Mike Enerio on UnsplashAlert follows complaintsThe alert follows multiple complaints from victims, prompting agencies like the Cyber Security Agency of Singapore (CSA), the Singapore Police Force (SPF) and the Personal Data Protection Commission (PDPC) to take action. These agencies emphasize the urgency of recognizing and combating this threat. How Akira operatesAkira affiliates employ various techniques to infiltrate a victim's network. These include exploiting known vulernabilities. For example, that could mean the targeting of services like Cisco virtual private networks (VPNs) that have been configured without multi-factor authentication (MFA). Another approach that the ransomware incorporates is attacking external-facing services such as the Remote Desktop Protocol (RDP) via brute force. Social engineering is another tool within its repertoire. This involves tricking victims into downloading malicious software or entering credentials on phishing websites. There is a marketplace for compromised credentials in the dark web. Akira also relies on such data, acquiring it from access brokers who sell network access.  Once inside a network, Akira affiliates often create new domain accounts to maintain persistent access, even after reboots. They use numerous tools to steal user credentials, escalate privileges and spread throughout the network. Detection and prevention measuresThe Singaporean advisory outlines several strategies for detecting, deterring and neutralizing Akira attacks. Authorities strongly advise against paying ransoms, on the basis that doing so does not guarantee data recovery or prevent future attacks. Authorities also warn that paying ransoms can encourage further attacks. The FBI has noted that Akira operators do not contact victims. Instead, they expect victims to initiate contact. Payment in BitcoinThe advisory outlines how Bitcoin is implicated in the ransomware scam. It states:”Ransom payments are requested in Bitcoin, which are directed to cryptocurrency wallet addresses specified by the affiliates. The TOR site (.onion) where victims contact the affiliates, contains stolen information and a list of the affected organisations.” It’s not the first time that Singaporean authorities have issued warnings that have implicated Bitcoin and crypto. In January, the CSA and SPF, in a joint advisory, suggested that people should use hardware wallets in an effort to guard against crypto-related malware and phishing attacks. A number of weeks prior to that, Singapore’s former Prime Minister, Lee Hsien Loong, took to Facebook to issue a warning with regard to a crypto scam that involved the use of deceptive content generated using artificial intelligence (AI). Mitigation techniquesBusinesses are being urged by the authorities to adopt best practices to mitigate the Akira ransomware threat. They suggest the implementation of a recovery plan alongside the use of multi-factor authentication (MFA) in order to secure data and the access to that data.  They also suggest filtering network traffic as it helps in identifying and blocking malicious activities. Meanwhile, disabling unused ports and hyperlinks curbs the risk further as it reduces the attack surface. Lastly, the authorities suggested the use of system-wide encryption to protect data even if it is accessed by unauthorized entities.

Mosca, a cash-to-crypto exchange headquartered at the Moscow International Business Center, was subject to a raid carried out by the Russian authorities on April 23. The raid occurred in the immediate aftermath of a call from a member of the commission of the Public Chamber (OP) of the Russian Federation to ban crypto exchanges from facilitating the purchase of cryptocurrencies using cash.Photo by Egor Filin on UnsplashInvestigating fraudWhile attending the Blockchain Life 2025 event in Moscow, Mosca’s Head of Development, Dmitry Titarenko, confirmed to Cointelegraph that the rationale provided for the raid was that it was in connection with fraud perpetrated by one of its platform users. Titarenko added: “Law enforcement agencies have carried out a standard procedure of checking our customer data.” The raid occurred during the company’s attendance at the Blockchain Life conference. Mosca was a key conference participant, having established two stands at the event and winning an award for the best crypto exchange service. Reporting on the raid, local media outlet Baza said that it had been carried out in relation to fraud perpetrated against the former head of the Samara Region Development Corporation, Olga Serova. It explained that Serova had been conned into handing over 350 million rubles ($4.24 million) and $800,000 to the scammers.  Seven arrestsShe withdrew these funds from her bank at the end of last year, despite bank officials having tried to persuade her against the withdrawal for this purpose. The news outlet added that to date, seven people have been arrested in connection with the alleged fraud. The Mosca exchange service may be proving to be attractive to scammers as the platform allows users to buy up to 100,000 USDT per day using cash. Titarenko couldn’t confirm that the raid was carried out in connection with the Serova fraud case. He said that “maybe it was [in relation to] another client.”The exchange executive also confirmed that the company had been in the process of putting in place more resources to carry out anti-money laundering (AML) and know-your-customer (KYC) checks, together with a blacklisting system related to suspicious platform users. Cash-to-crypto ban proposalThe raid occurred within 24 hours of Yevgeny Masharov, a member of the commission of the Public Chamber (OP) of the Russian Federation, putting forward a proposal to ban crypto exchanges from receiving cash, making services like Mosca’s cash-to-crypto exchange illegal. According to state-owned Russian news agency TASS, Masharov said that such a move would “cause a large-scale blow to scammers, because it’s no secret that telephone scammers use crypto exchangers to withdraw cash.”Sergey Mendeleev, a well-known figure within crypto circles in Russia, told attendees at the Blockchain Life conference that such a cash-to-crypto ban would be an unwelcome development for the sector. If such a ban were to materialize, Mendeleev suggested that it would be an indication that the Russian authorities were turning away from the greater development of cryptocurrency in Russia. Last week, it emerged that Russia’s Ministry of Finance, in collaboration with the country’s central bank, plans to launch a crypto exchange for qualified investors. The central bank also confirmed plans to launch a digital ruble payment network in 2026.