North Korea-Linked Hackers Exploit Radiant Capital for $50 Million Through Social Engineering

North Korean Hackers Orchestrate Sophisticated Attack A recent postmortem report reveals that North Korea-backed hackers, identified as UNC4736 (also known as Citrine Sleet), exploited Radiant Capital in a $50 million attack. The operation involved advanced social engineering tactics, with the attackers impersonating a "trusted former contractor" and distributing malware via a zipped PDF file. Phishing Through Fake Domains and Data Manipulation The hackers created a fake domain mimicking a legitimate Radiant Capital contractor and reached out to the Radiant team through Telegram. They requested feedback on an alleged smart contract audit project. However, the shared file concealed INLETDRIFT malware, which created macOS backdoors, granting the hackers access to hardware wallets of at least three Radiant developers. Manipulated Transactions and Compromised Security During the attack on October 16, the malware tampered with the Safe{Wallet} interface (formerly Gnosis Safe), displaying legitimate transaction data to developers while executing malicious transactions in the background. Despite adhering to stringent security protocols like Tenderly simulations and Standard Operating Procedures (SOP), the attackers successfully compromised multiple developer devices. UNC4736’s Links to North Korea According to cybersecurity firm Mandiant, UNC4736 is connected to North Korea's General Reconnaissance Bureau. This group is notorious for targeting cryptocurrency companies and financial institutions globally. North Korean Hackers Fund Nuclear Programs The Federal Bureau of Investigation (FBI) has previously warned about North Korean hackers’ sophisticated tactics, including targeting cryptocurrency exchanges and prominent firms. Research indicates that these state-backed groups have stolen approximately $3 billion from the cryptocurrency sector since 2017. The stolen funds are reportedly used to finance North Korea's nuclear weapons program. A Concerning Trend in Cybersecurity This case highlights the increasing sophistication of cyberattacks, as hackers deploy social engineering and advanced tools to target cryptocurrency firms. Radiant Capital fell victim to a meticulously planned operation, underscoring the urgent need for enhanced security measures within the crypto industry.

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