Maze Ransomware
Maze Ransomware: The Pioneer of Double Extortion Ransomware Attacks
Maze ransomware was first discovered in 2019 and is infamous for revolutionizing ransomware tactics by introducing the double extortion model. Beyond encrypting files, Maze operators stole sensitive data and threatened to publicly leak it if victims refused to pay, setting a precedent followed by many modern ransomware groups.
Introduction to Maze Ransomware
Maze ransomware targeted large organizations across multiple sectors, encrypting their data and exfiltrating sensitive information before demanding large ransoms. If payment wasn’t made, Maze operators published the stolen data on their dedicated leak site. This strategy increased the pressure on victims to pay, even if they had backups, and became the blueprint for many subsequent ransomware operations.
1. How Maze Ransomware Works
Infection Mechanism:
Maze commonly spread through phishing emails with malicious attachments or links. It also exploited vulnerabilities in remote desktop protocol (RDP) services and virtual private network (VPN) appliances. In some cases, initial access was purchased from other threat actors known as initial access brokers.
Encryption and Extortion Process:
After gaining access, Maze attackers conducted reconnaissance to locate sensitive data and high-value systems. They exfiltrated data and then deployed the ransomware, encrypting files using AES and RSA encryption. Victims received ransom notes with instructions for payment in exchange for decryption keys and promises not to leak the stolen data.
Double Extortion Tactics:
Maze pioneered double extortion in 2019, combining data encryption with data theft. If the ransom wasn’t paid, Maze operators threatened to leak or sell the stolen data on their "Maze News" leak site.
2. History and Notable Campaigns
Origin and Discovery:
Maze ransomware first appeared in May 2019. Initially, it was associated with a ransomware-as-a-service (RaaS) model, but its operators soon moved to highly targeted attacks, maximizing payouts from large organizations.
Notable Campaigns:
- Southwire Company (2019): Maze demanded an $8.5 million ransom from the U.S. wire manufacturer and published stolen data when they refused to pay.
- Cognizant (2020): IT services giant Cognizant suffered a Maze attack causing major service disruptions and operational damage.
- Canon (2020): Maze targeted Canon, allegedly stealing 10 terabytes of data, including sensitive corporate files.
3. Targets and Impact
Targeted Victims and Sectors:
Maze focused on high-value targets in industries such as:
- Healthcare
- Government
- Manufacturing
- Legal and professional services
- IT and software
Consequences:
Victims faced encrypted files, data leaks, reputational damage, and regulatory scrutiny. Ransom demands frequently ranged from hundreds of thousands to millions of dollars. The public leak of sensitive data often led to legal liabilities and compliance issues.
4. Technical Details
Payload Capabilities:
- File encryption: AES-256 encryption combined with RSA-2048 encryption for key protection.
- Data exfiltration: Stole sensitive data before encrypting files to maximize leverage.
- Persistence: Deployed tools like Mimikatz and Cobalt Strike for privilege escalation and lateral movement.
- Network propagation: Spread through networks, encrypting files across multiple endpoints and servers.
Command-and-Control (C2):
Maze used Tor-based communication for anonymity and hosted negotiation and payment portals on the dark web.
5. Preventing Maze Infections
Best Practices:
- Train employees on phishing awareness to reduce the risk of malicious email infections.
- Enforce multi-factor authentication (MFA) on all remote access services, such as RDP and VPNs.
- Regularly patch and update software and hardware to close vulnerabilities.
- Implement network segmentation and least privilege access policies.
Recommended Security Tools:
- Endpoint detection and response (EDR) solutions to detect lateral movement and suspicious activity.
- Email security solutions to block malicious attachments and phishing attempts.
- Immutable backup solutions and disaster recovery planning to restore data without paying ransoms.
6. Detecting and Removing Maze
Indicators of Compromise (IoCs):
- Presence of ransom notes titled DECRYPT-FILES.txt or similar.
- Encrypted files with extensions that vary per attack (no consistent extension).
- Unusual data exfiltration activity prior to encryption.
- Administrative tools like Mimikatz, Cobalt Strike, and PowerShell being used suspiciously.
Removal Steps:
- Isolate compromised systems immediately to prevent further spread.
- Conduct a full forensic investigation to identify how the attackers gained access and whether data was stolen.
- Remove the ransomware and related malware artifacts from the environment.
- Restore systems from verified, clean backups and enhance security to prevent reinfection.
Professional Help:
Organizations should involve cybersecurity experts and incident response teams to manage containment, eradication, and recovery, as well as assess legal and regulatory obligations.
7. Response to a Maze Attack
Immediate Steps:
- Disconnect affected systems from the network.
- Notify law enforcement and applicable regulatory bodies if sensitive data was stolen.
- Engage legal counsel before negotiating or considering ransom payment due to potential legal implications.
- Focus on data recovery from secure backups and post-incident hardening.
8. Legal and Ethical Implications
Legal Considerations:
Victims of Maze attacks often face regulatory requirements to notify affected individuals and data protection authorities under laws like GDPR, HIPAA, and others. There is also potential liability related to data leaks and privacy violations.
Ethical Considerations:
Paying a ransom can encourage further attacks and fund cybercriminal activities. Ethical responses prioritize transparency, recovery, and strengthening defenses to prevent future incidents.
9. Resources and References
- No More Ransom Project: General ransomware information (Maze has no known public decryptor).
- CISA Guidance on ransomware response and prevention.
- Cybercrime Magazine: Ransomware Report – Latest Attacks And News
10. FAQs about Maze Ransomware
Q: What is Maze ransomware?
Maze is a ransomware strain that encrypts files and exfiltrates data, using double extortion tactics to pressure victims into paying large ransoms.
Q: How did Maze ransomware spread?
Maze typically spread through phishing emails, exploited RDP services, and vulnerabilities in VPN appliances. Attackers often purchased access from initial access brokers.
Q: Is there a public decryptor for Maze ransomware?
No universal decryptor is available for Maze ransomware. Recovery typically relies on secure backups and professional remediation.
11. Conclusion
Maze ransomware changed the ransomware landscape by introducing double extortion, combining encryption with data theft and public shaming. Though Maze shut down its operations in 2020, its tactics have influenced nearly every major ransomware group that followed, highlighting the need for proactive cybersecurity measures and incident response preparedness.
« Back to the Virus Information Library