Fake Python Coding Tests Installed Malicious Software Packages From North Korea

“New malicious software packages tied to the North Korean Lazarus Group were observed posing as a Python coding skills test for developers seeking a new job at Capital One, but were tracked to GitHub projects with embedded malware,” reports SC magazine:
Researchers at ReversingLabs explained in a September 10 blog post that the scheme was a follow-on to the VMConnect campaign that they first identified in August 2023 in which developers were lured into downloading malicious code via fake job interviews.

More details from The Hacker News

These packages, for their part, have been published directly on public repositories like npm and PyPI, or hosted on GitHub repositories under their control. ReversingLabs said it identified malicious code embedded within modified versions of legitimate PyPI libraries such as pyperclip and pyrebase… It’s implemented in the form of a Base64-encoded string that obscures a downloader function, which establishes contact with a command-and-control server in order to execute commands received as a response.

In one instance of the coding assignment identified by the software supply chain firm, the threat actors sought to create a false sense of urgency by requiring job seekers to build a Python project shared in the form of a ZIP file within five minutes and find and fix a coding flaw in the next 15 minutes. This makes it “more likely that he or she would execute the package without performing any type of security or even source code review first,” Zanki said, adding “that ensures the malicious actors behind this campaign that the embedded malware would be executed on the developer’s system.”
Tom’s Hardware reports that “The capacity for exploitation at that point is pretty much unlimited, due to the flexibility of Python and how it interacts with the underlying OS. This is a good time to refer to PEP 668 which enforces virtual environments for non-system wide Python installs.”