How does HIDS work?

Host-based intrusion detection systems (HIDS) use a sensor identified as ‘HIDS agents‘ installed within the monitorable assets for detecting threats. A host-based system employs an aggregate of signature-based and anomaly-based detection systems. The signatures one examines files in comparison with a database of signatures that are perceived to be malicious. Simultaneously, the anomaly-based detection system examines events with a baseline of standard system behaviour.

The functioning of host IDS is similar to the home security systems that most of us have seen, but they are much more advanced and involve high-tech operations. The Host IDS records the sceptical activities and reports them to the teams operating the security monitoring and response. File and integrity monitoring is a critical function that tracks ingress/egress activities and changes to files on the host, recording audit events that can be used to analyse and validate data integrity. File Integrity Monitoring (FIM) is a helpful part of complying with regulatory requirements such as PCI DSS compliance. PCI compliance requirements state that a business needs to monitor resource usage in the cardholder data environment (CDE).

If you are gathering and managing all the different recorded data from various applications individually, it may instantly become an overwhelming task draining your available set of resources. Additionally, it is a tremendous amount of data to maintain track of. That is where a host-based intrusion detection system proves highly useful!

The host-based intrusion detection system’s tools monitor the applicant’s record files and create a report of the activities and functions. It allows you to instantly find them for anomalies while there might be signs of intrusion. Apart from that, a compilation of the report files is also provided, letting you keep them organised such that they align with the directory structure of the report files server. It makes the process of searching and sorting files according to the applications, dates, and other metrics almost hassle-free.