FrigidStealer Malware

FrigidStealer is a dangerous stealer-type malware that primarily targets macOS users. It is designed to infiltrate systems stealthily and steal sensitive information, including login credentials, cryptocurrency wallets, browser cookies, and notes stored on the device. The malware is distributed via fake browser updates and deceptive pop-ups that trick users into installing a malicious DMG file.

Once installed, FrigidStealer circumvents Mac’s built-in security features, such as Gatekeeper, and operates silently in the background, exfiltrating data to remote servers controlled by cybercriminals. Due to its stealthy nature and data theft capabilities, FrigidStealer poses serious privacy and financial risks to its victims.

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FrigidStealer Malware Overview

Below is a summarized table of the key characteristics of FrigidStealer:

Attribute	Details
Threat Name	FrigidStealer
Threat Type	Mac malware, password stealer, data exfiltration malware
Detection Names	Combo Cleaner (Trojan.GenericKD.75636707), Emsisoft (Trojan.GenericKD.75636707 (B)), Ikarus (OSX.Agent), Kaspersky (UDS:Trojan-PSW.OSX.Amos.ag)
Symptoms of Infection	No obvious symptoms; operates stealthily, recording and exfiltrating sensitive information
Damage	Stolen passwords, financial losses, identity theft, unauthorized access to personal accounts
Distribution Methods	Fake browser updates (Safari, Chrome), deceptive pop-ups, bundled software installers
Danger Level	Severe – capable of stealing highly sensitive information

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How FrigidStealer Infects macOS Devices

FrigidStealer is typically distributed through fraudulent web inject campaigns, which use fake software update prompts to trick users into downloading and installing the malware. These campaigns often mimic legitimate browser updates for Safari and Google Chrome.

1. Fake Update Prompts: Victims encounter pop-ups claiming their browser is outdated and needs an urgent update.
2. DMG File Installation: The user downloads a DMG file that appears to be a browser update.
3. Gatekeeper Bypass: The instructions guide the user to right-click and select “Open,” which circumvents macOS’s Gatekeeper security feature.
4. Credential Theft: Upon installation, FrigidStealer prompts the user to enter their macOS password, which it records.
5. Data Exfiltration: The malware searches the Desktop and Documents folders for files containing login credentials, cryptocurrency-related keywords, and browser cookies, sending this data to a remote command-and-control server.

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FrigidStealer Removal Guide?

To ensure a thorough removal of FrigidStealer, follow the steps below:

Step 1: Disconnect from the Internet

• Unplug your Ethernet cable or turn off Wi-Fi to prevent further data exfiltration.

Step 2: Boot Mac into Safe Mode

1. Shut down your Mac.
2. Turn it back on and immediately hold the Shift key until the Apple logo appears.
3. Release the key once you see the login screen.

Step 3: Manually Remove Suspicious Applications

1. Open Finder and go to Applications.
2. Look for any suspicious apps, especially ones installed around the time of infection.
3. Drag them to the Trash and empty it.

Step 4: Delete Malicious Files

1. Open Finder and select Go > Go to Folder.
2. Type the following paths and look for suspicious files:

   ~/Library/LaunchAgents/
   ~/Library/Application Support/
   /Library/LaunchDaemons/
   /Library/LaunchAgents/

3. Delete files related to unknown or suspicious apps.

Step 5: Scan with SpyHunter

1. Download SpyHunter for Mac.
2. Install the program and run a Full System Scan.
3. Review the scan results and remove any detected threats.
4. Restart your Mac to complete the removal process.

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How to Prevent FrigidStealer and Similar Threats

To protect your Mac from FrigidStealer and other malware threats, follow these best practices:

Avoid Downloading Fake Updates

• Never install software updates from pop-ups or third-party websites.
• Always update Safari, Chrome, and other browsers via official channels (e.g., Apple’s App Store, Google’s website).

Enable Gatekeeper and XProtect

• Go to System Preferences > Security & Privacy > General and set “Allow apps downloaded from” to App Store and identified developers.
• This setting helps block unsigned and suspicious applications.

Use a Reliable Antivirus

Install and regularly update a reputable anti-malware tool like SpyHunter for Mac to detect and block malware before it can cause damage.

Monitor Your Passwords and Online Accounts

• Use password managers to store credentials securely.
• Regularly check bank statements and accounts for unauthorized activity.
• Enable two-factor authentication (2FA) wherever possible.

Be Cautious with Free Software

• Avoid downloading cracked software or freeware from unverified sources.
• Many free programs come bundled with adware, trojans, or other malware.

Regularly Backup Important Files

• Use Time Machine or cloud-based services (iCloud, Google Drive) to keep backups of important files.
• In case of malware infection, you can restore a clean system version.

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Conclusion

FrigidStealer is a severe malware threat targeting macOS users. It is primarily distributed through deceptive pop-ups and fake browser updates that trick victims into installing malicious software. Once installed, it bypasses macOS security features and steals sensitive information such as passwords, cryptocurrency wallets, and browser cookies.

Removing FrigidStealer requires a combination of manual cleaning and using a dedicated anti-malware tool like SpyHunter. Additionally, users must adopt strong security practices to prevent future infections, such as avoiding fake updates, enabling macOS security features, using antivirus software, and practicing safe browsing habits.

By staying vigilant and implementing these measures, users can protect their devices and sensitive data from malicious threats like FrigidStealer.

If you are still having trouble, consider contacting remote technical support options.