mirror of
https://github.com/splunk/security_content
synced 2026-06-08 17:32:49 +00:00
Eric
72 lines
3.5 KiB
YAML
72 lines
3.5 KiB
YAML
name: MS Scripting Process Loading WMI Module
|
|
id: 2eba3d36-14a6-11ec-a682-acde48001122
|
|
version: 7
|
|
date: '2025-05-02'
|
|
author: Teoderick Contreras, Splunk
|
|
status: production
|
|
type: Anomaly
|
|
description: The following analytic detects the loading of WMI modules by Microsoft
|
|
scripting processes like wscript.exe or cscript.exe. It leverages Sysmon EventCode
|
|
7 to identify instances where these scripting engines load specific WMI-related
|
|
DLLs. This activity is significant because it can indicate the presence of malware,
|
|
such as the FIN7 implant, which uses JavaScript to execute WMI queries for gathering
|
|
host information to send to a C2 server. If confirmed malicious, this behavior could
|
|
allow attackers to collect sensitive system information and maintain persistence
|
|
within the environment.
|
|
data_source:
|
|
- Sysmon EventID 7
|
|
search: '`sysmon` EventCode =7 Image IN ("*\\wscript.exe", "*\\cscript.exe") ImageLoaded
|
|
IN ("*\\fastprox.dll", "*\\wbemdisp.dll", "*\\wbemprox.dll", "*\\wbemsvc.dll" ,
|
|
"*\\wmiutils.dll", "*\\wbemcomn.dll") | fillnull | stats count min(_time) as firstTime
|
|
max(_time) as lastTime by Image ImageLoaded dest loaded_file loaded_file_path original_file_name
|
|
process_exec process_guid process_hash process_id process_name process_path service_dll_signature_exists
|
|
service_dll_signature_verified signature signature_id user_id vendor_product | `security_content_ctime(firstTime)`
|
|
| `security_content_ctime(lastTime)` | `ms_scripting_process_loading_wmi_module_filter`'
|
|
how_to_implement: To successfully implement this search, you need to be ingesting
|
|
logs with the process name, parent process, and command-line executions from your
|
|
endpoints. If you are using Sysmon, you must have at least version 6.0.4 of the
|
|
Sysmon TA. Tune and filter known instances where renamed rundll32.exe may be used.
|
|
known_false_positives: automation scripting language may used by network operator
|
|
to do ldap query.
|
|
references:
|
|
- https://www.mandiant.com/resources/fin7-pursuing-an-enigmatic-and-evasive-global-criminal-operation
|
|
- https://attack.mitre.org/groups/G0046/
|
|
drilldown_searches:
|
|
- name: View the detection results for - "$dest$"
|
|
search: '%original_detection_search% | search dest = "$dest$"'
|
|
earliest_offset: $info_min_time$
|
|
latest_offset: $info_max_time$
|
|
- name: View risk events for the last 7 days for - "$dest$"
|
|
search: '| from datamodel Risk.All_Risk | search normalized_risk_object IN ("$dest$")
|
|
starthoursago=168 | stats count min(_time) as firstTime max(_time) as lastTime
|
|
values(search_name) as "Search Name" values(risk_message) as "Risk Message" values(analyticstories)
|
|
as "Analytic Stories" values(annotations._all) as "Annotations" values(annotations.mitre_attack.mitre_tactic)
|
|
as "ATT&CK Tactics" by normalized_risk_object | `security_content_ctime(firstTime)`
|
|
| `security_content_ctime(lastTime)`'
|
|
earliest_offset: $info_min_time$
|
|
latest_offset: $info_max_time$
|
|
rba:
|
|
message: $process_name$ loading wmi modules $ImageLoaded$ on $dest$
|
|
risk_objects:
|
|
- field: dest
|
|
type: system
|
|
score: 9
|
|
threat_objects: []
|
|
tags:
|
|
analytic_story:
|
|
- FIN7
|
|
asset_type: Endpoint
|
|
mitre_attack_id:
|
|
- T1059.007
|
|
product:
|
|
- Splunk Enterprise
|
|
- Splunk Enterprise Security
|
|
- Splunk Cloud
|
|
security_domain: endpoint
|
|
tests:
|
|
- name: True Positive Test
|
|
attack_data:
|
|
- data: https://media.githubusercontent.com/media/splunk/attack_data/master/datasets/malware/fin7/fin7_js_2/sysmon.log
|
|
source: XmlWinEventLog:Microsoft-Windows-Sysmon/Operational
|
|
sourcetype: XmlWinEventLog
|