Technical tip: Using FortiAnalyzer to detect the CISA top 20 vulnerabilities

[ck_FTNT]

Description	This article describes how to use a custom event handler in FortiAnalyzer to raise alerts for incident response related to attacks that attempt to exploit any of the top 20 CISA vulnerabilities. A report is also provided to gain historical visibility into logs.
Scope	This article contains the files necessary to load an event handler and report into the FortiAnalyzer for either a Fabric ADOM or a FortiGate ADOM. The Fabric report and event handler leverage log from other Fortinet products that can be used to detect the attack in addition to FortiGate logs. CVEs: CVE-2021-44228, CVE-2019-11510, CVE-2021-22205, CVE-2021-22005, CVE-2019-19781, CVE-2021-1497, CVE-2021-20090, CVE-2021-42237, CVE-2022-24112, CVE-2022-26134, CVE-2021-26855, CVE-2020-5902, CVE-2021-26084, CVE-2021-36260, CVE-2022-1388, CVE-2021-40539, CVE-2021-26857, CVE-2021-26858, CVE-2021-27065, CVE-2021-41773 For more information about the CISA top 20 vulnerabilities, see the following FortiGuard Outbreak Alert: CISA Top 20 Vulnerabilities
Solution	What is included in Fortinet_CISA_top_20.zip? 1) CISA_top_20_event-handler.json This event handler helps identify CISA_top_20 detected by FortiGates and other Fortinet products. 2) CISA_top_20_report.dat This report displays the findings on CISA_top_20 attacks from FortiGates and other Fortinet products.  3) fgt_CISA_top_20_event-handler.json The event handler for FortiGate ADOMs is configured for FortiGate logs only. 4) fgt_CISA_top_20_report.dat The report for FortiGate ADOMs includes FortiGate charts only. Steps. 1) Download the Fortinet_CISA_top_20.zip file (contains 4 files). 2) Unzip Fortinet_CISA_top_20.zip. 3) Import CISA_top_20_event-handler.json or fgt_CISA_top_20_event-handler.json event handler: - Choose an ADOM (if ADOMs are enabled). The ADOM may be of type Fabric or FortiGate: - Choose the FortiSOC module.  - Select Event Handler List. - Select the Import option under 'More'. - Select the appropriate event handler depending on the ADOM type. Result. The event handler is enabled and will be triggered if the appropriate logs are received following the import of the event handler.  Edit the event handler to customize the notification section. 4) Import CISA_top_20_report.dat or fgt_CISA_top_20_report.dat to Reports: - Choose an ADOM (if ADOMs are enabled). ADOM may be of type Fabric or FortiGate. - Choose the Report module. - Select the Import option under 'More'. - Select the appropriate file for the ADOM type to add the report to the ADOM. Result. The CISA_top_20_report can be run anytime as determined by an admin user.