Windows IIS Components Get-WebGlobalModule Module Query
Description
The following analytic identifies the execution of the PowerShell cmdlet Get-WebGlobalModule, which lists all IIS Modules installed on a system. It leverages PowerShell input data to detect this activity by capturing the module names and the image paths of the DLLs. This activity is significant for a SOC because it can indicate an attempt to enumerate installed IIS modules, which could be a precursor to exploiting vulnerabilities or misconfigurations. If confirmed malicious, this could allow an attacker to gain insights into the web server's configuration, potentially leading to further exploitation or privilege escalation.
- Type: Hunting
-
Product: Splunk Enterprise, Splunk Enterprise Security, Splunk Cloud
- Last Updated: 2024-05-03
- Author: Michael Haag, Splunk
- ID: 20db5f70-34b4-4e83-8926-fa26119de173
Annotations
ATT&CK
Kill Chain Phase
- Installation
NIST
- DE.AE
CIS20
- CIS 10
CVE
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`iis_get_webglobalmodule`
| stats count min(_time) as firstTime max(_time) as lastTime by host name image
| rename host as dest
| `security_content_ctime(firstTime)`
| `security_content_ctime(lastTime)`
| `windows_iis_components_get_webglobalmodule_module_query_filter`
Macros
The SPL above uses the following Macros:
windows_iis_components_get-webglobalmodule_module_query_filter is a empty macro by default. It allows the user to filter out any results (false positives) without editing the SPL.
Required fields
List of fields required to use this analytic.
- _time
- host
- name
- image
How To Implement
You must ingest the PwSh cmdlet Get-WebGlobalModule in order to utilize this analytic. Follow https://gist.github.com/MHaggis/64396dfd9fc3734e1d1901a8f2f07040
Known False Positives
This analytic is meant to assist with hunting modules across a fleet of IIS servers. Filter and modify as needed.
Associated Analytic Story
RBA
Risk Score | Impact | Confidence | Message |
---|---|---|---|
1.0 | 10 | 10 | IIS Modules have been listed on $dest$. |
The Risk Score is calculated by the following formula: Risk Score = (Impact * Confidence/100). Initial Confidence and Impact is set by the analytic author.
Reference
- https://docs.splunk.com/Documentation/Splunk/9.0.2/Data/MonitorWindowsdatawithPowerShellscripts
- https://gist.github.com/MHaggis/64396dfd9fc3734e1d1901a8f2f07040
- https://github.com/redcanaryco/atomic-red-team/tree/master/atomics/T1505.004
Test Dataset
Replay any dataset to Splunk Enterprise by using our replay.py
tool or the UI.
Alternatively you can replay a dataset into a Splunk Attack Range
source | version: 2