FIM – File Integrity Monitoring is a security process that tracks changes to files, directories, and system configurations to ensure they remain consistent with approved or expected states. It is commonly used to detect unauthorised modifications, which could indicate a security breach, malware, or insider threats.
Here’s a simple breakdown:
- Monitoring File Changes: FIM continuously monitors files and logs changes, such as edits, deletions, or additions. It ensures that only authorised modifications are made to critical files.
- Alerting on Suspicious Activity: If an unexpected or unauthorised change occurs, the FIM system generates an alert so administrators can investigate and respond quickly.
- Baseline Comparison: FIM tools establish a known "baseline" of approved file states. Any deviation from this baseline is flagged for review, helping to maintain system integrity.
Why Use FIM? FIM is essential for maintaining compliance with security regulations (e.g., PCI DSS, HIPAA) and safeguarding critical files from tampering. It helps organisations detect potential breaches, enforce security policies, and maintain operational reliability.
Common Uses of FIM:
- Monitoring critical system files, logs, and configurations.
- Detecting malware or ransomware altering files.
- Ensuring compliance with regulatory frameworks that require integrity monitoring.
Think of FIM as a digital security guard for your files, keeping an eye on changes and alerting you to any unauthorised or suspicious activity to ensure the integrity and security of your systems.
