Understanding The Gentlemen RaaS Group’s Tactics
The Gentlemen ransomware-as-a-service (RaaS) group has quickly become a significant cyber threat, utilising custom backdoors and evolving tactics to target large organisations. In the first half of 2026, The Gentlemen ranked among the top 10 ransomware actors based on victim announcements. Their sophisticated approach highlights the need for organisations to remain vigilant against cyber threats.
Initial Access: Exploiting VPNs and Credentials
Targeting Vulnerable Entry Points
The Gentlemen group typically gains entry into corporate networks by exploiting vulnerabilities in online services, especially hardware VPNs and firewalls. Attackers frequently use weak, default or leaked credentials, making devices exposed to the internet particularly attractive targets. This method is not unique but is a proven tactic that continues to yield results for threat actors.
- Exploiting misconfigured VPNs and firewalls
- Using stolen or weak login credentials
- Collaborating with initial access brokers
- Rapid deployment of ransomware after initial access
In some incidents, The Gentlemen’s affiliates held access to systems for extended periods before launching ransomware. This suggests involvement from other groups or brokers, and highlights the complexity of modern cyber threats.
Reconnaissance: Mapping the Network and Gathering Intelligence
Advanced Tools for Internal Mapping
The Gentlemen conduct extensive reconnaissance once inside a network, using tools such as SharpADWS, NetScan, Advanced IP Scanner and Microsoft’s netsh. SharpADWS is particularly notable for its ability to enumerate Active Directory objects while bypassing standard logging, using wrapped LDAP queries.
- SharpADWS: Enumerates domain objects, bypasses logs
- NetScan/Advanced IP Scanner: Discovers active ports, services and vulnerabilities
- netsh: Captures network packets for detailed analysis
These tools enable attackers to map the environment thoroughly, identify weaknesses and establish control over critical systems. The use of netsh for packet capture allows attackers to collect unencrypted network activities, including credentials, which can be analysed further with applications like Wireshark.
Packet Capture and Credential Harvesting
The group’s use of netsh to start and stop packet captures is a particularly concerning tactic. Captured data is stored in shared administrative folders, often with random names to avoid detection. Analysing these packets can reveal sensitive information such as passwords, session tokens and network activity, enabling attackers to escalate privileges or move laterally within the network.
Custom Backdoors: Enhanced Persistence and Control
Bespoke Tools for Evasion
The Gentlemen RaaS group invests in developing custom backdoors and tools, allowing them to maintain persistence, evade detection and control compromised systems. These custom solutions are tailored to avoid common security products, making them harder for traditional endpoint protection to detect and remove.
- Custom backdoors for persistent access
- Tools designed to bypass standard logging
- Automated reconnaissance and exfiltration capabilities
By building their own tools and constantly evolving their tactics, The Gentlemen demonstrate a level of sophistication that poses a challenge for defenders.
Why This Matters: Risks to Organisations
Threats to Data and Operations
Ransomware attacks by groups like The Gentlemen can lead to severe disruption, data leaks and financial losses. The combination of custom backdoors, advanced reconnaissance and collaboration with access brokers means that no organisation is immune to their tactics. Large corporations and critical infrastructure are particularly at risk.
- Operational disruption from ransomware deployment
- Data breach and exposure through leak sites
- Threats to reputation and customer trust
- Potential regulatory fines and legal consequences
Understanding the tactics used by The Gentlemen is essential for strengthening defences and minimising risk. Their evolving methods serve as a reminder that cyber threats are constantly changing.
Defending Against Custom Backdoors and Evolving Tactics
Proactive Steps for Organisations
Organisations should take several proactive measures to defend against custom backdoors and evolving ransomware tactics:
- Patch and Harden VPNs/Firewalls: Regularly update firmware and software, disable unused services and avoid default credentials.
- Enforce Strong Authentication: Implement multi-factor authentication for remote access and privileged accounts.
- Monitor for Unusual Reconnaissance: Set up alerts for tools like SharpADWS, NetScan and netsh usage, especially on administrative shares.
- Restrict Administrative Access: Limit access to shared folders and monitor for random file creation by unknown users.
- Conduct Regular Security Audits: Review logs, scan for custom malware and validate network segmentation.
- Educate Staff: Train employees to recognise phishing and social engineering attempts.
By focusing on these areas, organisations can reduce exposure to the tactics used by The Gentlemen and similar ransomware groups.
Conclusion: Staying Ahead of Ransomware Threats
The Gentlemen RaaS group exemplifies the growing sophistication of ransomware actors, using custom backdoors and evolving tactics to compromise organisations. Their approach, from initial access via vulnerable VPNs to advanced reconnaissance and bespoke tool development, highlights the need for continuous improvement in cybersecurity practices. By understanding these threats and implementing layered defences, organisations can better protect their assets and minimise the impact of ransomware attacks.
Originally reported by securelist.com.
