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New ZuRu Malware Variant Weaponizes Termius SSH Client to Attack macOS Users

Once launched, the counterfeit helper runs the legitimate .Termius Helper1 to preserve normal UX while spawning a loader dubbed .localized, which drops a modified Khepri command-and-control beacon under /tmp/.fseventsd and begins polling its operator every five seconds over port 53. Coupled with the five-second heartbeat and background-daemon mode toggle, ZuRu maintains low-latency access even across reboots, highlighting how a single compromised utility can cascade into full-scale network exposure for macOS-centric engineering teams. With years of experience under his belt in Cyber Security, he is covering Cyber Security News, technology and other news. Cyber Security News is a Dedicated News Platform For Cyber News, Cyber Attack News, Hacking News & Vulnerability Analysis. A fresh strain of the long-running macOS.ZuRu family has surfaced, hiding inside a doctored of the popular Termius SSH client and quietly turning developer workstations into remote footholds. First seen in late May 2025, the 248 MB rogue disk image looks and behaves like the genuine installer but stealthily inserts a 25 MB Mach-O binary into the Termius Helper bundle. Beyond data theft, the enhanced beacon can transfer arbitrary files, run shell instructions, and capture output, granting operators persistent, high-fidelity control of compromised Macs. Tushar is a Cyber security content editor with a passion for creating captivating and informative content. Because the implant swaps Termius’s developer signature for an ad-hoc one, Gatekeeper’s trust model is sidestepped, letting the bundle execute without notarization dialogs. The campaign specifically targets IT staff and software engineers who favor third-party terminals, underscoring the growing risk posed by pirated or tampered productivity apps.

This Cyber News was published on cybersecuritynews.com. Publication date: Wed, 23 Jul 2025 17:30:09 +0000


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