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New macOS Malware 'ReaderUpdate' Upgraded Arsenal With Nim and Rust Variants

A sophisticated macOS malware loader platform known as “ReaderUpdate” has significantly evolved its capabilities, with researchers identifying new variants written in Nim and Rust programming languages. Initially distributed as a compiled Python binary, ReaderUpdate has expanded its arsenal with implementations in Crystal, Nim, Rust, and most recently Go, showcasing the malware authors’ adaptability and technical sophistication. Cyber Security News is a Dedicated News Platform For Cyber News, Cyber Attack News, Hacking News & Vulnerability Analysis. Analysis revealed that the malware operators have established an extensive infrastructure spanning multiple domains, including entryway[.]world, airconditionersontop[.]com, and streamingleaksnow[.]com, among others. With years of experience under his belt in Cyber Security, he is covering Cyber Security News, technology and other news. Once installed, ReaderUpdate establishes persistence and communicates with command and control (C2) servers to receive further instructions or deliver secondary payloads. SentinelOne researchers noted that the malware’s modular architecture and loader capabilities make it particularly concerning, as it can easily pivot to delivering more dangerous payloads. This setup enables the malware to maintain resilience against system reboots while positioning itself to receive further commands from its operators. Tushar is a Cyber security content editor with a passion for creating captivating and informative content. The loader’s capability to execute arbitrary commands makes it a potential vector for Pay-Per-Install (PPI) or Malware-as-a-Service (MaaS) operations targeting macOS users. The compiled Python version weighs 5.6MB, while the Go variant is 4.5MB, Crystal is 1.2MB, Rust is 400KB, and Nim is the smallest at just 166KB. Online marketplaces have become increasingly popular in developing countries since 2015, providing platforms for trading various goods from used electronics to brand-new items.

This Cyber News was published on cybersecuritynews.com. Publication date: Thu, 27 Mar 2025 14:05:15 +0000


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