Threat Intel
Bomgar RMM Compromise Surge: Immediate Defensive Actions
Huntress SOC reports a spike in attacks targeting Bomgar RMM instances. Defenders should verify patch status, enforce MFA, isolate compromised endpoints, and monitor for lateral movement. Immediate remediation can limit attacker persistence.
Huntress SOC has observed a recent uptick in incidents where attackers compromise Bomgar Remote Monitoring and Management (RMM) instances. The attacks leverage the RMM’s privileged access to pivot into corporate networks.
What Happened
Multiple organizations reported unauthorized access to Bomgar RMM servers, with attackers using stolen credentials and exploiting known vulnerabilities in older releases.
Impact
Compromised RMM instances grant attackers full control over the host machine, enabling lateral movement, data exfiltration, and persistence. The risk is elevated for environments that rely on Bomgar for remote support or system management.
What to Do
- Verify that all Bomgar RMM servers are running the latest version (currently 2024.3 or newer).
- Enforce multi‑factor authentication for all RMM accounts and disable legacy authentication protocols.
- Isolate any RMM instance that shows anomalous activity and perform a forensic review of logs.
- Restrict network access to RMM servers to a narrow IP range and apply strict firewall rules.
- Implement continuous monitoring for lateral movement indicators such as unexpected SMB traffic or new scheduled tasks.
Prompt remediation and strict access controls are essential to prevent attackers from using RMM as a foothold in your network.
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