Technical Tip: Using FortiAnalyzer to detect activities related to the Lazarus RAT Attack | CVE-2021-44228

ck_FTNT · ‎12-12-2023

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 leverage the Lazarus RAT Attack. A report is also provided to gain historical visibility into the logs.

Note that this article provides alpha files which are automatically generated. The article will be continually updated as more information becomes available.

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 logs from other Fortinet products that can be used to detect the attack in addition to FortiGate logs.

For more information, see the FortiGuard Outbreak Report.

Solution

What is included in Fortinet_Lazarus RAT Attack.zip:

Lazarus RAT Attack_event-handler.json.
This event handler helps identify the Lazarus RAT Attack detected by FortiGate and other Fortinet products.
Lazarus RAT Attack_report.dat.
This report displays the findings on Lazarus RAT Attack attacks from FortiGate and other Fortinet products.

Steps:

Download the Fortinet_Lazarus RAT Attack.zip file (contains 2 files).
Unzip Fortinet_Lazarus RAT Attack.zip.
Import Lazarus RAT Attack_event-handler.json:

Choose an ADOM (if ADOMs are enabled). The ADOM must be the Fabric type.
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.

Import Lazarus RAT Attack_report.dat to Reports:
- Choose an ADOM (if ADOMs are enabled).
- 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 Lazarus RAT Attack_report can be run anytime as determined by an admin user.