Parsing rules

JahidAliyev — Fri, 16 Feb 2024 08:14:26 GMT

Hello,

I am sending Cisco Asa logs to Cortex XDR and XDR automatically creates parsing rule of "Ingest". When I am searching for "cisco_asa_rules" in query, I got a field named "raw" which contains detailed format of log:

That is a detailed format of raw field:

---

<116>Feb 16 2024 05:54:25 firepower : %FTD-4-430003: EventPriority: Low, DeviceUUID: baafab88-ed6c-11ec-baf4-ca1c8650edd2, InstanceID: 9, FirstPacketSecond: 2024-02-16T05:54:25Z, ConnectionID: 11587, AccessControlRuleAction: Allow, SrcIP: x, DstIP: x, SrcPort: 54659, DstPort: 80, Protocol: tcp, IngressInterface: Inside, EgressInterface: outside, IngressZone: Inside, EgressZone: outside-zone, SourceSecurityGroup: 26, SourceSecurityGroupTag: 26, SourceSecurityGroupType: Session Directory, IngressVRF: Global, EgressVRF: Global, ACPolicy: BRD-FTD4112-AccessPolicy, AccessControlRuleName: DNA GUEST to OUTSIDE, Prefilter Policy: BRD-FTD-4112-PrefilterPolicy, UserAgent: HT Parental Controls 8.6.1, Client: Web browser, ApplicationProtocol: HTTP, WebApplication: Web Browsing, ConnectionDuration: 0, InitiatorPackets: 5, ResponderPackets: 17, InitiatorBytes: 696, ResponderBytes: 17532, NAPPolicy: Balanced Security and Connectivity, HTTPResponse: 403, ReferencedHost: hidetools.com, URL: http://hidetools.com, NAT_InitiatorPort: 54659, NAT_ResponderPort: 80, NAT_InitiatorIP: x, NAT_ResponderIP: x, ClientAppDetector: AppID

---

I want Cortex XDR to show me necessary fields seperately. For example, when I query to cisco_asa dataset, I want to see Source IP, Destination IP, Ports and action that was done.

Can you help me. How can I seperate these data from "raw" field and show them seperately inside "cisco_asa" dataset.

Thanks in advance...

Re: Parsing rules

jmazzeo — Fri, 16 Feb 2024 12:52:43 GMT

Hi @JahidAliyev, thanks for reaching us using the Live Community.

I'll recommend you to start with this recent webinar about Parsing Rules: https://live.paloaltonetworks.com/t5/cortex-xdr-webinars/cortex-customer-success-webinar-series-part-1-getting-started/ta-p/575388

You will learn there the basics to start creating parsing rules, and I'm sure this will help you to think how to create this one. In this case you should us regular expressions to parse the logs.

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Parsing rules

Re: Parsing rules