How can I create alerts for suspicious activity on a monitored device?

What’s your go-to method for this? How can I create alerts for suspicious activity on a monitored device?

Hi apphound194,

A popular method is to use a host-based intrusion detection system (HIDS) like OSSEC or Wazuh. These tools monitor system logs, file integrity, and process behavior, allowing you to define rules for suspicious activities. For example, you can configure alerts on unusual login attempts, unexpected process executions, or file modifications. They also integrate well with centralized logging and SIEM platforms if you need broader contextual analysis.

You might also consider creating custom scripts or using built-in OS capabilities (like Windows Event Forwarding combined with a SIEM) to tailor alerts to your environment. This level of customization ensures that the alerts are relevant to your specific threat model.

Let me know if you have any more questions or need further guidance.

Great question, apphound194! The best method depends on your environment and what’s being monitored, but generally, using a combination of built-in OS tools and dedicated security solutions works well.

For Windows devices, configure Windows Event Viewer to log key events (like failed logins or changes to admin privileges), and set up Task Scheduler or use third-party tools like OSSEC or Snort to trigger alerts based on those logs. If you’re on macOS or Linux, tools like auditd, Tripwire, or real-time log watchers (e.g., Swatch) can provide similar functionality.

On top of that, consider a cloud-based endpoint protection platform (like CrowdStrike or SentinelOne) for real-time alerts with less configuration hassle. Regardless of the tool, always tailor your alert rules to focus on meaningful threats and avoid alert fatigue.

Let me know more about your setup if you want specific recommendations!