Objects > Custom Objects > Spyware/Vulnerability
The firewall supports the ability to create custom spyware and vulnerability signatures using the firewall threat engine. You can write custom regular expression patterns to identify spyware phone home communication or vulnerability exploits. The resulting spyware and vulnerability patterns become available for use in any custom vulnerability profiles. The firewall looks for the custom-defined patterns in network traffic and takes the specified action for the vulnerability exploit.
Weekly content releases periodically include new decoders and contexts for which you can develop signatures.
You can optionally include a time attribute when defining custom signatures by specifying a threshold per interval for triggering possible actions in response to an attack. Action is taken only after the threshold is reached.
Custom Spyware Signaturepage to define signatures for Anti-Spyware profiles. Use the
Custom Vulnerability Signaturepage to define signatures for Vulnerability Protection profiles.
Custom Vulnerability and Spyware Signature Settings
Enter a numeric identifier for the configuration (spyware signatures range is 15000-18000; vulnerability signatures range is 41000-45000).
Specify the threat name.
Select this option if you want the custom signature to be available to:
Disable override (
Select this option to prevent administrators from overriding the settings of this signature in device groups that inherit the signature. This selection is cleared by default, which means administrators can override the settings for any device group that inherits the signature.
Enter an optional comment.
Assign a level that indicates the seriousness of the threat.
Indicate whether the threat is assessed from the client to server, server to client, or both.
Indicate whether the threat involves the client, server, either, or both. Applies to vulnerability signatures, but not spyware signatures.
Specify the common vulnerability enumeration (CVE) as an external reference for additional background and analysis.
Specify the vendor identifier for the vulnerability as an external reference for additional background and analysis.
Specify the bugtraq (similar to CVE) as an external reference for additional background and analysis.
Add any links to additional analysis or background information. The information is shown when a user clicks on the threat from the ACC, logs, or vulnerability profile.
Adda new signature. Specify the following information:
Add a condition by clicking
Add Or Conditionor
Add And Condition. To add a condition within a group, select the group and then click
Add Condition. Add a condition to a signature so that the signature is generated for traffic when the parameters you define for the condition are true. Select an
Operatorfrom the drop-down. The operator defines the type of condition that must be true for the custom signature to match to traffic. Choose from
Greater Than, or
Combinationand specify the following information:
Combination Signaturesto specify conditions that define signatures:
Time Attributeto specify the following information: