The North Koreans invested great effort in creating and promoting a game that apparently drained users’ wallets.

The North Koreans invested great effort in creating and promoting a game that apparently drained users’ wallets.

The North Korean Lazarus Group of hackers used a fake blockchain-based game to exploit a zero-day vulnerability in Google’s Chrome browser and install spyware that stole wallet credentials. Kaspersky Labs analysts noticed the exploit in May and reported it to Google, which has fixed it.

Play at a big risk

The hacker’s play-to-earn multiplayer online battle arena game was fully playable and had been promoted on LinkedIn and X. The game was called DeTankZone or DeTankWar and used non-fungible tokens (NFTs) as tanks in a worldwide competition.

Users were infected from the website, even if they did not download the game. The hackers modeled the game on the existing DeFiTankLand.

The hackersusedmalware called Manuscrypt followed by a previously unknown “type confusion bug in the V8 JavaScript engine.” It was the seventh zero-day vulnerability found in Chrome in 2024 through mid-May.

Kaspersky principal security expert Boris Larin said:

“The significant effort invested in this campaign suggests they had ambitious plans, and the actual impact could be much broader, potentially affecting users and businesses worldwide.”

The fake game wasnoticedby Microsoft Security in February, though the hackers removed the exploit from the website before Kaspersky could analyze it. The lab informed Google of it anyway and Google fixed the vulnerability in Chrome before the hackers could use it again.

Screenshot from Lazarus Group’s fake game. Source:SecureList

North Korea loves crypto

Zero-day vulnerabilities take the vendor by surprise and there is no ready patch for them. It took Google 12 days to patch the vulnerability in question.

Another North Korean hacker group harnessed a different zero-day vulnerability in Chrome to target crypto holders earlier this year.

Source:Microsoft Threat Intelligence

Lazarus Group is fond of crypto. Between 2020 and 2023, itlaundered over $200 millionin crypto from 25 hacks, according to crypto crime watcher ZachXBT.

The United States Treasury Department also alleged Lazarus Groupto be behind the attack onRonin Bridge that netted crypto worth over $600 million in 2022.

US cybersecurity firm Recorded Future found that North Korean hackers as a wholestole over $3 billion in crypto between 2017 and 2023.