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A concerning trend of hackers exploiting open-source software supply chains has been identified, with malicious backdoors being planted in Python and NPM packages. Security researchers at Checkmarx Zero have uncovered a sophisticated campaign where attackers are using typosquatting and name-confusion tactics to trick users into downloading harmful software. This cross-ecosystem approach targets both Windows and Linux systems, deploying multi-platform payloads with the capability to steal data and establish remote control. These findings highlight the growing need for enhanced security measures within open-source ecosystems to combat supply chain attacks.
This campaign leverages the Python Package Index (PyPI) and Node Package Manager (NPM) by mimicking legitimate software. Specifically, the attack targeted users of "colorama," a popular Python tool, and "colorizr," a similar JavaScript package, by uploading packages with names like "coloramapkgs" and "colorizator". The malicious packages carry dangerous payloads designed to give attackers remote access and control, allowing them to harvest and exfiltrate sensitive data. On Windows systems, the malware attempts to bypass antivirus software, while on Linux, it establishes encrypted connections, steals information, and maintains a hidden presence. Fortunately, the identified malicious packages have been removed from public software repositories, limiting their immediate potential for damage. However, the lack of clear attribution data makes it difficult to trace the campaign back to a known adversary. Vet, an open-source tool designed to help developers and security engineers spot risks in their software supply chains, goes beyond traditional software composition analysis by detecting known vulnerabilities and flagging malicious packages. It supports ecosystems like npm, PyPI, Maven, Go, Docker, and GitHub Actions, assisting in the detection of supply chain attacks.
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TIGR Threat@Security Risk Advisors
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A supply chain attack has successfully compromised the 'rand-user-agent' npm package, injecting obfuscated code designed to activate a remote access trojan (RAT) on unsuspecting users' systems. This JavaScript library, used for generating randomized user-agent strings beneficial for web scraping and automated testing, has been averaging 45,000 weekly downloads despite being deprecated. The malicious activity was detected by an automated malware analysis pipeline on May 5, 2025, which flagged the [email protected] version for containing unusual code indicative of a supply chain attack.
The injected RAT was designed to establish a persistent connection with a command and control (C2) server at http://85.239.62[.]36:3306. Upon activation, the RAT transmits critical machine identification data, including hostname, username, operating system type, and a generated UUID, enabling attackers to uniquely identify and manage compromised systems. Once connected, the RAT listens for commands from the C2 server, allowing attackers to manipulate the file system, execute arbitrary shell commands, and exfiltrate data from affected systems. Researchers at Aikido noted that threat actors exploited the package's semi-abandoned but still popular status to inject malicious code into unauthorized releases. The compromised versions of the package were promptly removed from the npm repository. Users are advised to check their systems for any installations of the compromised package and implement robust security practices to mitigate the risk of similar supply chain attacks. This incident underscores the critical importance of vigilant monitoring and dependency management in software development to protect against supply chain vulnerabilities.
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@Talkback Resources
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Cybersecurity researchers have recently discovered a series of malicious packages lurking within the npm registry, a popular repository for JavaScript packages. These packages are designed to mimic the legitimate "node-telegram-bot-api," a widely-used library for creating Telegram bots. However, instead of providing bot functionalities, these rogue packages install SSH backdoors on Linux systems, granting attackers persistent, passwordless remote access. The identified malicious packages include "node-telegram-utils," "node-telegram-bots-api," and "node-telegram-util," which have accumulated around 300 downloads collectively.
The packages employ a technique known as "typosquatting," where they use names similar to the legitimate library to deceive developers into installing them. They also utilize "starjacking" by linking to the genuine library's GitHub repository, further enhancing their appearance of authenticity. Once installed on a Linux system, these malicious packages inject SSH keys into the "~/.ssh/authorized_keys" file, enabling attackers to remotely access the compromised machine. They also collect system information, including the username and external IP address, and transmit it to a remote server controlled by the attackers. Security experts warn that simply removing the malicious packages is insufficient to eliminate the threat. The injected SSH keys provide a persistent backdoor, allowing attackers to execute code and exfiltrate data even after the packages are uninstalled. This incident highlights the growing threat of supply chain attacks targeting development ecosystems like npm, underscoring the importance of rigorous dependency auditing and vigilant monitoring to safeguard systems from malicious code and unauthorized access. The researchers at Socket recommend immediate defensive actions to combat these types of threats.
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