DFIR Report: The Gentlemen RaaS & SystemBC Proxy – Inside the High-Risk Ransomware Operation of 2026

# DFIR Report: The Gentlemen RaaS & SystemBC Proxy – Inside the High-Risk Ransomware Operation of 2026

What happened

In mid-2025, a new ransomware-as-a-service (RaaS) group known as The Gentlemen surfaced in underground cybercrime forums, rapidly gaining notoriety for their sophisticated multi-platform ransomware and the use of SystemBC proxy malware to facilitate stealthy communications and lateral movement. By early 2026, The Gentlemen had expanded their affiliate network, leveraging penetration testers and skilled hackers to deploy ransomware across Windows and Linux environments.

The group’s modus operandi involves infecting victims with SystemBC, a proxy malware that masks command-and-control (C2) traffic, enabling encrypted and obfuscated communication channels. This proxy layer complicates detection and forensic investigation, allowing ransomware payloads to execute with minimal interference. The Gentlemen’s ransomware encrypts critical files across multiple operating systems, demanding hefty ransoms and threatening data leaks.

Confirmed facts

• Emergence and Operation: The Gentlemen RaaS began operations around mid-2025, advertising on multiple underground forums to recruit affiliates.
• Multi-OS Capabilities: Their ransomware supports Windows and Linux platforms, increasing their attack surface and victim base.
• SystemBC Proxy Usage: The group deploys SystemBC malware to establish proxy connections, hiding C2 communications and enabling stealthy lateral movement within networks.
• Affiliate Model: The RaaS model invites technically skilled operators, including penetration testers, to distribute ransomware in exchange for a share of ransom payments.
• Attack Vectors: Initial access is often gained through phishing campaigns, exploiting vulnerabilities, or brute forcing credentials.
• High-Risk Targets: The group targets enterprises with valuable data, including healthcare, finance, and manufacturing sectors.
• Ransom Demands and Data Leak Threats: Victims face significant ransom demands, often coupled with threats to leak sensitive data if payments are not met.

Who is affected

The Gentlemen’s operations have primarily impacted medium to large enterprises across various industries globally, with confirmed cases in North America, Europe, and Asia. Organizations running Windows and Linux servers are at heightened risk, especially those with exposed remote access services or insufficient network segmentation.

End users within affected organizations may experience data loss, operational downtime, and potential identity theft if personal information is compromised. The use of SystemBC complicates detection, meaning infections can persist undetected for weeks, increasing damage.

What to do now

• Immediate Incident Response: If you suspect infection by The Gentlemen ransomware or SystemBC malware, isolate affected systems immediately to prevent lateral spread.
• Engage DFIR Experts: Employ digital forensics and incident response professionals to analyze network traffic and identify proxy communications indicative of SystemBC.
• Patch and Harden Systems: Apply all critical patches, especially for remote access services and known vulnerabilities exploited by the group.
• Review Access Controls: Enforce strong authentication mechanisms, disable unused accounts, and monitor for brute force attempts.
• Backup Verification: Ensure backups are recent, offline, and tested for integrity to enable recovery without paying ransom.
• Monitor Threat Intelligence: Stay updated with emerging indicators of compromise (IOCs) related to The Gentlemen and SystemBC.

How to secure yourself

• Implement Network Segmentation: Limit lateral movement by segmenting critical assets and restricting proxy malware propagation.
• Deploy Endpoint Detection and Response (EDR): Use advanced EDR tools capable of detecting proxy malware behaviors and multi-OS ransomware.
• User Training: Conduct targeted phishing awareness training focusing on social engineering tactics used by The Gentlemen affiliates.
• Multi-Factor Authentication (MFA): Enforce MFA on all remote access and privileged accounts to reduce credential compromise risk.
• Regular Security Audits: Conduct penetration testing and vulnerability assessments to identify and remediate weaknesses exploited by ransomware groups.
• Network Traffic Analysis: Monitor for unusual encrypted proxy traffic patterns that may indicate SystemBC activity.

FAQ

What is The Gentlemen ransomware-as-a-service?

The Gentlemen is a ransomware operation offering its ransomware platform to affiliates who distribute the malware and share in ransom payments. It supports multiple operating systems and uses proxy malware to evade detection.

How does SystemBC proxy malware work?

SystemBC acts as a proxy to hide command-and-control communications between infected machines and attacker servers, encrypting and obfuscating traffic to avoid network detection.

Am I affected if I use Linux servers?

Yes, The Gentlemen ransomware targets both Windows and Linux systems, so Linux servers are at risk, especially if exposed to the internet or lacking proper security controls.

What immediate steps should I take if I suspect infection?

Isolate affected systems, engage incident response teams, patch vulnerabilities, review access controls, and verify backups to prepare for recovery.

Has The Gentlemen group been disrupted by law enforcement?

There have been some takedowns of affiliate infrastructure, but the decentralized nature and use of proxy malware make complete disruption difficult.

How can I detect SystemBC activity on my network?

Look for unusual encrypted proxy traffic, unexpected outbound connections, and use EDR tools with behavioral detection capabilities.

What changed in The Gentlemen’s tactics in 2026?

They have enhanced evasion techniques, targeted cloud and container environments, and increased use of polymorphic payloads.

Should I pay the ransom if infected?

Paying ransom is discouraged as it funds criminal activity and does not guarantee data recovery. Focus on incident response and recovery from backups.

How can I protect my organization long-term?

Implement zero-trust security models, continuous monitoring, regular training, and invest in advanced threat detection technologies.

Why this matters

The emergence of The Gentlemen RaaS and their use of SystemBC proxy malware represents a significant escalation in ransomware sophistication. Their multi-OS targeting and proxy-based stealth techniques complicate detection and response, increasing the risk of prolonged outages and data breaches. Understanding their tactics and implementing robust defenses is critical to safeguarding critical infrastructure and sensitive data in 2026 and beyond.

Sources and corroboration

This report synthesizes findings from multiple corroborated sources, primarily based on the detailed analysis published by Check Point Research on April 20, 2026 ([research.checkpoint.com](https://research.checkpoint.com/2026/dfir-report-the-gentlemen/)). Additional threat intelligence and incident reports from global cybersecurity firms have been integrated to provide a comprehensive view of The Gentlemen and SystemBC operations.

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