What is a .RULES file?
A .rules file holds intrusion-detection rules for Snort or Suricata.
- Did you know
- These rules tell network monitors which traffic patterns signal an attack.
- Each rule has a header that sets the action, protocol, addresses, ports and traffic direction, followed by options defining the payload to match.
- Suricata was built to understand Snort’s rule syntax, so the same .rules files can often feed both detection engines.
- What Analyser reads
- Identify and read more security and forensics files: OpenPGP messages/keys/signatures (.pgp/.gpg/.sig - armor type, packet walk, key algorithm and user ID, secret-key warning), YARA rules, Snort/Suricata IDS rules, STIX/OpenIOC threat intel, Fiddler captures (.saz), 1Password exports (.1pux), Apple Keychain, KeePass 1.x (.kdb), Microsoft keys (.pvk) and AFF/AFF4 forensic images.
- Depth of analysis
- .RULES is an identification-grade format: Analyser recognises it from its bytes and decodes the header metadata it carries, rather than opening it in a full viewer. Formats that do get a full viewer are marked "Full" on the formats page.
- Open a .RULES file
- Drag a .RULES file onto the Analyser home page (or tap to pick one). It is identified entirely in your browser - nothing is uploaded, there is no account, and it works offline once installed.