Those Roblox npm downloads could be infected with malware

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Cybersecurity researchers have once again found (and eradicated) malicious npm packages, this time delivering ransomware and password-stealing trojans on unsuspecting users.

Pretending to be Roblox JavaScript libraries, the two malicious npm packages were named noblox.js-proxy and noblox.js-proxies, and use typo-squatting to present themselves to anyone looking for the legitimate Roblox API wrapper called noblox.js-proxied, by altering a single letter in the library's name.

“These typosquatting packages mimic noblox.js, a popular Roblox game API wrapper that exists on npm as both a standalone package, along with legitimate variants such as noblox.js-proxied (ending in ‘d’ not ‘s’),” shares Sonatype’s security researcher, Juan Aguirre.

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Noblox.js is an open source JavaScript API for the popular game Roblox. According to Aguirre, the library, which has clocked over 700,000 downloads, is commonly used to create in-game scripts that interact with the Roblox website.

A sinister prank?

Analysis of the malicious libraries has revealed that their authors had stuffed them with malware, the MBRLocker ransomware that impersonates the notorious GoldenEye ransomware, a password stealing trojan, as well as a spooky video.

Aguirre points out that the two typosquatting libraries couldn’t do any real damage since they were caught not long after they were uploaded, though they still managed to clock 281 and 106 downloads respectively. 

“...but it’s clear what type of scale the threat actors were hoping for going after such a popular component,” notes Aguirre.  

Interestingly, this attempt to deliver ransomware comes just a few days after Sonatype researchers had uncovered an audacious attempt by threat actors to hijack the account of the developer of the widely used UAParser.js library to replace the legitimate code with malicious one infused with malware and trojans.

While Sonatype believes the fake roblox libraries were probably planted as a prank, the incident is a further indication that adversaries aren’t going to stop abusing popular open source repositories anytime soon.  

Mayank Sharma

With almost two decades of writing and reporting on Linux, Mayank Sharma would like everyone to think he’s TechRadar Pro’s expert on the topic. Of course, he’s just as interested in other computing topics, particularly cybersecurity, cloud, containers, and coding.