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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 Microsoft Exchange Autodiscover RCE with CVEs CVE-2022-41040 and CVE-2022-41082. 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. |
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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.
Logs used: - FortiADC IPS - FortiGate IPS - FortiGate IPS Vulnerability - FortiWeb WAF For more information about this attack, see the following FortiGuard Outbreak Alert: |
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Solution |
What is included in Fortinet_Microsoft_Exchange_Autodiscover_RCE.zip?
1) Microsoft_Exchange_Autodiscover_RCE_event-handler.json This event handler helps identify Microsoft Exchange Autodiscover RCE detected by FortiGates and other Fortinet products.
2) Microsoft_Exchange_Autodiscover_RCE_report.dat This report displays the findings on Microsoft Exchange Autodiscover RCE attacks from FortiGates and other Fortinet products.
3) fgt_Microsoft_Exchange_Autodiscover_RCE_event-handler.json The event handler for FortiGate ADOMs is configured for FortiGate logs only.
4) fgt_Microsoft_Exchange_Autodiscover_RCE_report.dat The report for FortiGate ADOMs includes FortiGate charts only.
Steps 1) Download the Fortinet_Microsoft_Exchange_Autodiscover_RCE.zip file (contains 4 files).
2) Unzip Fortinet_Microsoft_Exchange_Autodiscover_RCE.zip.
3) Import Microsoft_Exchange_Autodiscover_RCE_event-handler.json or fgt_Microsoft_Exchange_Autodiscover_RCE_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 Microsoft_Exchange_Autodiscover_RCE_report.dat or fgt_Microsoft_Exchange_Autodiscover_RCE_report.dat to Reports:
- Choose an ADOM (if ADOMs are enabled). ADOM may be of type Fabric or FortiGate. - Select the appropriate file for the ADOM type to add the report to the ADOM.
Result: The Microsoft_Exchange_Autodiscover_RCE_report can be run anytime as determined by an admin user. |
