Cybersecurity researchers from Volexity have discovered a previously unknown, custom malware (opens in new tab) designed for macOS that they say is capable of taking control of the target’s Google Drive account.
The malware is most likely developed by Storm Cloud, a Chinese cyber-espionage threat actor that, judging by its complexity, has formidable skills and resources.
After retrieving it from a compromised MacBook Pro running macOS 11.6 (Big Sur), the researchers named the malware GIMMICK. It’s described as a multi-platform malware, written in Objective C, or .NET and Delphi, depending on the operating system it targets.
We're looking at how our readers use VPNs with different devices so we can improve our content and offer better advice. This survey shouldn't take more than 60 seconds of your time. Thank you for taking part.
>> Click here to start the survey in a new window (opens in new tab) <<
Once GIMMICK infects an endpoint, it establishes a session to the Google Drive cloud storage (opens in new tab), using hard-coded OAuth2 credentials. Then, it loads three separate malware elements - DriveManager, FileManager, and GCDTimerManager.
These give the attackers the ability to manage Google Drive and proxy sessions, maintain a local map of the Google Drive directory hierarchy in memory, manage locks for syncing tasks on the Drive session, and manage upload and download tasks.
The commands GIMMICK supports, the publication further details, includes transmitting base system information, uploading files to the command and control server (C2), downloading files to the client endpoint, executing a shell command, writing output to C2, and overwriting client work period information.
> This creepy macOS malware secretly takes screenshots of your device (opens in new tab)
> How to clean up your MacBook and iMac with an anti-malware tool (opens in new tab)
> More Mac malware was detected last year than ever before (opens in new tab)
“Due to the asynchronous nature of the malware operation, command execution requires a staged approach. Though the individual steps occur asynchronously, every command follows the same.” Volexity explained.
To tackle the malware, Apple pushed out new protections to all supported macOS versions, in the form of new signatures for XProtect and MRT antivirus solutions (opens in new tab). All users are advised to head over to Apple’s support page (opens in new tab), and follow the instructions found there.
The malware is quite the find, the publication claims. Usually, in cyber-espionage campaigns such as this one, threat actors make sure they leave no traces of their presence, and usually delete any code used.
- Here's our rundown of the best ransomware protection (opens in new tab) of today
Via: BleepingComputer (opens in new tab)