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Description

The following analytic identifies usage of wmic.exe spawning a local or remote process, identified by the node switch. During triage, review parallel processes for additional commands executed. Look for any file modifications before and after wmic.exe execution. In addition, identify the remote endpoint and confirm execution or file modifications. Contain and isolate the endpoint as needed.

  • Type: TTP
  • Product: Splunk Enterprise, Splunk Enterprise Security, Splunk Cloud
  • Datamodel: Endpoint
  • Last Updated: 2018-12-03
  • Author: Rico Valdez, Michael Haag, Splunk
  • ID: 272df6de-61f1-4784-877c-1fbc3e2d0838

Annotations

ATT&CK

ATT&CK

ID Technique Tactic
T1047 Windows Management Instrumentation Execution
Kill Chain Phase
  • Actions on Objectives
NIST
  • PR.PT
  • PR.AT
  • PR.AC
  • PR.IP
CIS20
  • CIS 3
  • CIS 5
CVE
1
2
3
4
5
6
| tstats `security_content_summariesonly` count min(_time) as firstTime max(_time) as lastTime from datamodel=Endpoint.Processes where `process_wmic` Processes.process=*node* by Processes.dest Processes.user Processes.parent_process Processes.process_name Processes.process Processes.process_id Processes.parent_process_id 
| `drop_dm_object_name(Processes)` 
| `security_content_ctime(firstTime)` 
| `security_content_ctime(lastTime)` 
| `remote_wmi_command_attempt_filter`

Macros

The SPL above uses the following Macros:

:information_source: remote_wmi_command_attempt_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
  • Processes.user
  • Processes.process_name
  • Processes.parent_process_name
  • Processes.dest
  • Processes.parent_process
  • Processes.parent_process_id
  • Processes.process_id

How To Implement

To successfully implement this search you need to be ingesting information on process that include the name of the process responsible for the changes from your endpoints into the Endpoint datamodel in the Processes node. In addition, confirm the latest CIM App 4.20 or higher is installed and the latest TA for the endpoint product. Deprecated because duplicate of Remote Process Instantiation via WMI.

Known False Positives

Administrators may use this legitimately to gather info from remote systems. Filter as needed.

Associated Analytic Story

RBA

Risk Score Impact Confidence Message
36.0 60 60 A wmic.exe process $process$ contain node commandline $process$ in host $dest$

:information_source: 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

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: 4