North Korean cyber group WaterPlum targeted developers with fake jobs at crypto, AI and NFT companies, infecting at least 30,000 devices across more than 100 countries.
North Korean hacking group WaterPlum stole at least $10.7 million by posing as recruiters for legitimate crypto and AI companies, attacking unsuspecting job seekers with malware.
The group, also known as Contagious Interview, targets software developers and IT professionals worldwide, according to a joint advisory from Japan, Germany, Australia and the US. Authorities said the fake recruiters impersonated legitimate AI, cryptocurrency or non-fungible token (NFT) companies and also used recruiting services.
“The primary targets were individual web designers, engineers, and specialists in cryptocurrency, blockchain, and Web3 technologies,” they added.
The advisory also links WaterPlum to North Korea’s broader campaign of placing IT workers inside foreign companies, with Japanese and US authorities assessing that WaterPlum actors and some North Korean IT workers operate under North Korea’s Munitions Industry Department.
According to the advisory, WaterPlum lured job seekers through social media platforms, online job platforms, gig work platforms or freelance marketplaces. During the recruitment process, victims were instructed to download and execute malicious files disguised as coding assignments or fixes for video-conferencing errors.
Related: North Korea using foreign talent to help infiltrate US companies: Report
Once the cyber actors obtained backdoor access to a victim’s computer, they used remote-access trojans and infostealing malware to exfiltrate sensitive data and cryptocurrency.
Successful infections also create opportunities for WaterPlum actors to infiltrate organizations that employ the unsuspecting developers.
WaterPlum infected at least 30,000 devices in more than 100 countries, with funds or account credentials extracted from over 7,000 cryptocurrency wallets between December 2025 and July 2026.
However, the damage can extend beyond stolen cryptocurrency. Stolen identity documents allow North Korean IT workers to impersonate victims and earn income, and sensitive information could be used for extortion, it said.
The advisory described a case in which a suspected North Korean IT worker applied for an engineering role at a Japanese crypto exchange using a forged resume. The exchange rejected the applicant after finding discrepancies during the interview, including an inability to explain the skills listed in his resume in detail.
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