Delete and exclude indicators - Threat Intel Management Guide - Cortex XSIAM - Cortex

Abstract

Indicators added to an exclusion list are disregarded by the system. Add indicators to an exclusion list in Cortex XSIAM.

Indicators added to an exclusion list are disregarded by the system and are not created or involved in automated flows such as indicator extraction. You can still manually enrich IP addresses and URLs that are on the exclusion list, but the results are not posted to the War Room.

Add indicators to the exclusion list either in the Indicators table or in the Exclusion List page.

From the Exclusion List page, you can view the list of excluded indicators, add an indicator to the exclusion list, or define indicator values to be excluded using a regular expression (regex) or CIDR.

Select Settings → Configurations → Object Setup → Indicators → Exclusion List → New excluded indicator.
Add the indicator value. For example, example.com (for a domain).
Caution
Ensure you are using the correct syntax when defining the values for your exclusion lists.
Select whether to use Regex.
A regular expression enables you to identify a sequence of characters in an unknown string. The following example would identify www.demisto.com: [A-Za-z0-9!@#$%\.&]*demisto[A-Za-z0-9!@#$%\.&]*.
Classless inter-domain routing (CIDR) enables you to define a range of IP addresses. For example, the IPv4 block 192.168.100.0/22 represents the 1024 IPv4 addresses from 192.168.100.0 to 192.168.103.255.
Add a reason that you are excluding the indicator.
Add the indicator types to apply.
Save the excluded indicator.

Exclusion	Description	Settings
Domain, URLs, and subdomains	Excludes a specific domain, and all subdomains and URLs associated with the domain.	Define two entries to cover all URLs and subdomains associated with a specific domain. Entry one: Value: Subdomains and URLs. Example: `\.example\.com` Select Use Regex. Do not select any indicator types. Entry two: Value: The specific domain. Example: `example.com` Do NOT select Use Regex. Do not select any indicator types.
Subdomain (and URLs) specifically	Excludes any subdomains and URLs of a domain, but the domain is still extracted.	Value: Subdomains and URLs. Example: `\.example\.com` Select Use Regex. Do not select any indicator types.
Specific domain only	Excludes a specific domain. Subdomains and URLs are still extracted.	Value: The specific domain. Example: `example.com` Do NOT select Use Regex. Select indicator type: Domain.
URL with wildcards	Excludes any indicators of type URL matching the regex. Indicators example.com and examplesub.example.com of type Domain would still be extracted. Start the regex with `https?://` to exclude both HTTP and HTTPS URLs.	Value: The URL with wildcard added at the end. Example: `http://examplesub.example.com` Select Use Regex. Select indicator type: URL.
Specific URL	Excludes a specific URL, but the domain and subdomains are still extracted.	Value: The specific URL. Example: `http://examplesub.example.com/myexample` Do NOT select Use Regex. Select indicator type: URL.
URLs, domain, and subdomains, case-insensitive, anchored to start	Excludes domain example.com, its subdomains, and its URLs. Case-insensitive. Anchors regex match to the start of the indicator value, so indicators that contain but do not start with a match (e.g., example.net?param=example.com) are not excluded.	Value: Domain, subdomains and URLs, case insensitive and anchored to the start of the indicator. Example: `(?i)^(https?://)?(([a-zA-Z0-9\-]+\.)+)?example\.com` Select Use Regex. Select indicator types: URL, Domain.
All URLs	Excludes all URLs for a specific domain that have a path (even an empty path), but the domain and subdomains are still extracted.	Value: URLs with or without a path. Example: `example\.com/` Select Use Regex. Do not select any indicator types.

Delete and exclude indicators - Threat Intel Management Guide - Cortex XSIAM - Cortex - Security Operations

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