OtterCookie Malware: A Dangerous Trojan Targeting Cryptocurrency Wallets

Cyber threats continue to evolve, with malicious actors creating sophisticated malware to steal sensitive information. One such recent threat is OtterCookie, a Trojan that primarily targets cryptocurrency wallets and login credentials. This malware, believed to be associated with North Korean threat actors, has been active since at least the autumn of 2024. Attackers have used OtterCookie alongside InvisibleFerret and BeaverTail malware strains to execute financial cybercrimes.

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OtterCookie Malware Threat Summary

Feature	Details
Name	OtterCookie virus
Threat Type	Trojan, password-stealing virus, banking malware, spyware
Detection Names	Avast (Script:SNH-gen [Trj]), Combo Cleaner (JS:Trojan.JS.Agent.VBB), DrWeb (JS.BackDoor.65), Kaspersky (HEUR:Trojan-PSW.Script.Generic), Microsoft (Trojan:Win32/Alevaul!rfn)
Symptoms of Infection	No obvious symptoms; silent infiltration and operation
Distribution Methods	Malicious email attachments, fake software cracks, malicious ads, social engineering
Damage	Stolen cryptocurrency keys, stolen passwords, identity theft, financial loss, clipboard hijacking
Danger Level	High

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OtterCookie Malware Analysis

OtterCookie operates as a remote access Trojan (RAT), granting attackers unauthorized access to infected systems. The malware's primary objective is to steal cryptocurrency wallet credentials by extracting sensitive data from documents and image files. The malware achieves this through clipboard monitoring and shell command execution.

At the time of research, two versions of OtterCookie were identified, both capable of executing remote commands. However, the newer variant relies more heavily on shell commands for credential theft. Initially, the malware focused on Ethereum wallets, but future versions may expand to other digital assets and banking credentials.

Infection Chain & Attack Progression

OtterCookie infections have been traced back to developer-oriented platforms such as repositories. The attack typically progresses as follows:

1. Initial Infection: The victim downloads a compromised software package or script, unknowingly installing the malware.
2. Loader Deployment: A loader-type malware executes, introducing OtterCookie (sometimes alongside BeaverTail or InvisibleFerret).
3. Command & Control (C2) Communication: The malware establishes a connection with the attacker's server, allowing remote commands to be executed.
4. Data Collection & Exfiltration: OtterCookie begins extracting cryptocurrency wallet credentials, clipboard data, and other sensitive information.
5. Persistent Access: The malware may modify system settings to ensure persistence, allowing attackers to maintain control over the compromised system.

Due to its stealthy nature, victims may not notice the infection until financial losses occur.

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Comprehensive OtterCookie Removal Guide

Removing OtterCookie manually can be difficult, as the malware often embeds itself deep within the system. Using SpyHunter, a professional malware removal tool, is recommended for efficient detection and removal.

Step 1: Boot Your PC in Safe Mode with Networking

1. Restart your computer.
2. Before Windows loads, press F8 (or Shift + F8 on some systems).
3. Select Safe Mode with Networking and press Enter.

Step 2: Install & Run SpyHunter

1. Download SpyHunter.
2. Run the installer and follow the on-screen instructions.
3. Launch SpyHunter and click Start Scan Now.
4. Wait for the scan to complete. SpyHunter will list all detected threats, including OtterCookie.
5. Click Fix Threats to remove the malware from your system.

Step 3: Remove Suspicious Programs & Browser Extensions

1. Windows Users:
   • Open Control Panel > Programs and Features.
   • Look for unknown or recently installed programs.
   • Right-click and select Uninstall.
2. Browser Extensions:
   • Open Chrome/Firefox/Edge and go to Extensions/Add-ons.
   • Remove suspicious or unfamiliar extensions.

Step 4: Clear System Cache & Temporary Files

1. Open Run (Win + R) and type temp, then press Enter.
2. Delete all files in the Temp folder.
3. Open Run again, type %temp%, and delete all files.
4. Empty the Recycle Bin.

Step 5: Reset Browser Settings

1. Open your browser’s settings.
2. Locate Reset settings or Restore default settings.
3. Confirm the reset to remove malicious changes.

Step 6: Enable a Firewall & Update Your Security Software

• Ensure Windows Defender Firewall is enabled.
• Update your antivirus software and run a full system scan.

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How to Prevent Future Infections

1. Avoid Suspicious Emails & Attachments

• Do not open emails from unknown senders.
• Do not download attachments unless verified.

2. Download Software Only from Official Sources

• Avoid using third-party software repositories.
• Always verify the authenticity of software providers.

3. Use a Strong Password Manager & 2FA

• Enable Two-Factor Authentication (2FA) for all accounts.
• Use a password manager to store credentials securely.

4. Regularly Update Your OS & Software

• Install updates for Windows, browsers, and security software.
• Keep all applications patched to minimize vulnerabilities.

5. Use an Anti-Malware Solution

• Keep SpyHunter or a similar security tool installed.
• Run scheduled scans to detect potential threats.

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Conclusion

OtterCookie is a highly dangerous Trojan that poses severe risks to cryptocurrency holders and internet users. This malware operates silently, making detection difficult without the help of security tools like SpyHunter. By following the removal guide and implementing preventive measures, users can safeguard their systems from this and other cyber threats. Stay vigilant and practice safe browsing habits to protect your digital assets.