FlexibleFerret, a new variant of malware, has been discovered targeting macOS users while evading Apple’s XProtect security tool. This malware is part of a larger campaign attributed to North Korean threat actors, who have used deceptive tactics to lure job seekers into installing malicious software. The malware is distributed through a fake Apple Installer package, which contains several harmful components. Once installed, these components execute a script that silently installs additional payloads, enabling the malware to communicate with external servers and maintain persistence on infected devices.
The campaign, named “Contagious Interview,” initially targeted job seekers but has since expanded to include developers, leveraging platforms like GitHub.
By exploiting the popularity of remote work tools and job-related software, the attackers have disguised their malicious payloads as necessary applications for virtual interviews. The malware masquerades as a legitimate Zoom application, attempting to gain the victim’s trust. However, the payload communicates with a fake domain, posing a serious risk to both personal and professional data.
SentinelOne’s analysis reveals that FlexibleFerret contains various components, including a fake Zoom binary, which connects to a malicious server to exfiltrate data. The installer also tricks users into believing the malware is a legitimate program by displaying a misleading error message. In doing so, it installs a persistence item on the system, ensuring the malware survives system reboots. This persistence allows the malware to continually collect sensitive data, such as user credentials, and relay it to a remote server.
Experts strongly advise users to exercise caution when installing software from untrusted sources. The FlexibleFerret campaign serves as a reminder of the ongoing threat posed by cybercriminals who exploit trending technologies to deceive victims. It is essential for both individual users and organizations to keep security systems updated and use trusted software to reduce the risk of falling victim to similar attacks in the future.
