OSX.Bundlore: What Is it & How to Remove This Malware from MacOS?

macOS Bundlore: A Persistent Adware Threat Affecting Macs Since 2015

macOS Bundlore (also known as OSX.Bundlore or Crossrider) is a persistent adware threat that continues to plague macOS users. This malware cleverly disguises itself as legitimate software to bypass security measures and infiltrate your Mac. Once installed, it bombards you with intrusive advertisements, potentially redirecting you to malicious websites or prompting you to divulge personal information. Despite Apple's ongoing security updates, Bundlore adapts its methods, highlighting the importance of vigilance for all Mac users.

Understanding macOS Bundlore

Bundlore is a type of adware, a form of malware designed to display unwanted ads and install affiliate software. Its key tactic is bundling itself with legitimate applications during installation, making it difficult to detect. The creators consistently update Bundlore to circumvent Apple's security patches. Earlier versions used malicious browser extensions to hijack searches; newer versions employ custom user profiles to achieve the same outcome.

The Dangers of Bundlore

Bundlore's impact extends beyond mere annoyance. Its intrusive pop-up ads can lead to malicious websites, potentially downloading even more harmful malware, viruses, or ransomware. The adware also collects sensitive user data, including IP addresses, search queries, browsing history, and potentially even passwords. Furthermore, Bundlore significantly degrades browser performance. The primary goal is financial gain for the attackers through ad clicks, impressions, and affiliate commissions.

Infection Methods and Evasion Techniques

Bundlore often disguises itself as free software, updates, or helpful utilities, enticing users to download it from unofficial sources like torrents or pop-up ads. This underscores the importance of downloading software only from trusted, official sources. The myth of Mac immunity to malware is false; Macs are vulnerable, just like Windows PCs.

Bundlore's ability to evade macOS security mechanisms is noteworthy. Earlier versions exploited vulnerabilities in macOS versions prior to 10.13. Apple addressed these by enhancing System Integrity Protection (SIP), but Bundlore has adapted, using techniques like custom user profiles and manipulating system files to maintain persistence.

A Technical Deep Dive into Bundlore's Operation

Bundlore's operation involves several stages, beginning with a bash script (Install.sh) that downloads and executes a malicious application (often mm-install-macOS). This application, along with components like WebTools, employs various techniques:

• Command-and-Control Communication: Bundlore regularly checks for updates from remote servers, downloading and installing new versions.

• Privilege Escalation and Persistence: WebTools uses sophisticated methods to bypass SIP, gain elevated privileges, and ensure its persistence through LaunchAgents or LaunchDaemons. It also creates hidden backups of its components.

• Advertisement Delivery: Bundlore injects malicious JavaScript code into browsers using AppleScript, displaying unwanted advertisements and potentially collecting user data. Different methods are used depending on the macOS and browser versions.

Bundlore's Infrastructure

The infrastructure behind Bundlore involves numerous servers and domains, many of which have remained active for extended periods. This points to a well-organized and persistent operation, with strong connections between different components.

Removing Bundlore from Your Mac

Removing Bundlore requires a multi-step approach:

1. Manual Removal of Files and Folders: Identify and delete Bundlore-related files and folders from locations like /Library/Application Support/, /Library/LaunchAgents/, and ~/Library/LaunchAgents/. (See images below for examples of file locations and names).

2. Removing Malicious Browser Extensions: Uninstall any suspicious extensions from your web browser (Safari, Chrome, Firefox). (See images below for examples of extension removal).

3. Using Anti-Malware Software: Employ a reputable anti-malware solution like MacKeeper's Antivirus to detect and remove any remaining threats. (See images below for examples of MacKeeper's Antivirus interface).

4. Manual Uninstallation of Programs: If any malicious programs remain visible, uninstall them manually from the Applications folder. (See images below for examples of manual uninstallation).

Conclusion

macOS Bundlore is a serious threat that requires proactive measures to prevent and remove. By practicing safe downloading habits and using reliable anti-malware software, you can significantly reduce your risk of infection. Remember, prompt action is crucial if you suspect an infection.

The above is the detailed content of OSX.Bundlore: What Is it & How to Remove This Malware from MacOS?. For more information, please follow other related articles on the PHP Chinese website!