This analytic leverages Sysmon Event ID 3 (Network connection) to monitor traffic generated by these specific binaries. It applies per-binary exclusions to ignore standard ports (e.g., 80, 443) that are commonly used by legitimate administrative and update workflows. When a process communicates over a non-standard port, it creates a high-signal anomaly that warrants investigation to determine if the process is being used as a vector for malicious network activity.

Impact

Successful exploitation allows attackers to bypass traditional signature-based network defenses, perform stealthy data exfiltration, or maintain persistent C2 access. These techniques are observed in various threat campaigns, including ransomware operations, remote access tool (RAT) deployments, and modular backdoor infections. If left undetected, attackers can leverage these trusted binaries to execute arbitrary code or maintain long-term access to critical enterprise segments.

Recommendation

Detection engineering teams should prioritize the integration of network traffic telemetry that includes the associated process name and destination port.

• Implement the detection logic in your SIEM using Sysmon Event ID 3.
• Tune the baseline of your environment by identifying and excluding legitimate software installation, support tooling, and synchronization workflows that utilize non-standard ports.
• Use the process execution logs to provide additional context when an alert fires to confirm if the binary execution originated from a trusted source or a user-initiated command.
• Investigate any high-risk alerts by pivoting to process lineage and external IP reputation.