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Posted on: 18 Jun 2024 | Author: Foresiet

Malicious Package Discovered on PyPI

Cybersecurity researchers have uncovered a malicious Python package in the Python Package Index (PyPI) repository designed to distribute an information stealer known as Lumma (aka LummaC2). The counterfeit package, crytic-compilers, mimics the legitimate crytic-compile library through typosquatting tactics. Before its removal by PyPI maintainers, the counterfeit package was downloaded 441 times.

Impersonation and Deception Tactics

The fraudulent library was crafted to closely mimic the legitimate crytic-compile utility, even aligning its version numbers to create the impression of being a newer version. While the authentic library’s latest version is 0.3.7, the fake crytic-compilers starts at version 0.3.8 and goes up to 0.3.11.

Furthering the deception, some versions of crytic-compilers included modifications to the script to install the actual crytic-compile package. However, the latest version of the counterfeit package drops all pretenses and checks if the operating system is Windows. If it is, it launches an executable file ("s.exe") designed to fetch additional payloads, including the Lumma Stealer.

Lumma Stealer and its Distribution

Lumma Stealer operates under a malware-as-a-service (MaaS) model, making it available to other criminal actors. Its distribution methods are varied, including trojanized software, malvertising, and fake browser updates. This discovery highlights how seasoned threat actors are now targeting Python developers, exploiting open-source registries like PyPI to distribute their data theft arsenal.

Fake Browser Update Campaigns Target WordPress Sites

In a related development, Sucuri revealed that over 300 WordPress sites have been compromised with fake Google Chrome update pop-ups. These pop-ups redirect site visitors to malicious MSIX installers that deploy information stealers and remote access trojans. The attack chain involves unauthorized access to the WordPress admin interface, where attackers install a legitimate plugin called Hustle – Email Marketing, Lead Generation, Optins, Popups. This plugin is then used to upload the malicious code responsible for displaying the fake browser update pop-ups.

Mitigation and Best Practices

These incidents underscore the importance of vigilant cybersecurity practices. For Python developers and WordPress administrators, implementing robust security measures, such as multi-factor authentication (MFA) and regular software updates, is crucial. Additionally, leveraging stolen credentials detection, dark web surveillance, and digital threat scoring can help detect and respond to threats effectively.

Foresiet encourages organizations to enhance their digital footprint analysis and brand protection strategies to safeguard against evolving cyber threats. By staying proactive and informed, you can defend against adversaries aiming to exploit vulnerabilities in open-source and cloud-based environments.


The discovery of the fake crytic-compilers package on PyPI and the fake browser update campaigns targeting WordPress sites highlight the evolving tactics of cybercriminals. It’s essential for organizations to prioritize cybersecurity, implement best practices, and stay vigilant to protect their digital assets from sophisticated threats.

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Foresiet is the pioneering force in digital security solutions, offering the first integrated Digital Risk Protection SaaS platform. With 24x7x365 dark web monitoring and proactive threat intelligence, Foresiet safeguards against data breaches and intellectual property theft. Our robust suite includes brand protection, takedown services, and supply chain assessment, enhancing your organization's defense mechanisms. Attack surface management is a key component of our approach, ensuring comprehensive protection across all vulnerable points. Compliance is assured through adherence to ISO27001, NIST, GDPR, PCI, SOX, HIPAA, SAMA, CITC, and Third Party regulations. Additionally, our advanced antiphishing shield provides unparalleled protection against malicious emails. Trust Foresiet to empower your organization to navigate the digital landscape securely and confidently.

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