Detection rules › Splunk

Remote WMIC Query (PowerShell)

Group by
_time, host
Source
github.com/anvilogic-forge/armory

An adversary can use WMI to interact with local and remote systems and use it as a means to execute various behaviors, such as gathering information for Discovery as well as remote Execution of files as part of Lateral Movement. This use case detects execution of WMIC commands with the '/node' switch, indicating potential remote operations or information gathering attempts on network endpoints

MITRE ATT&CK coverage

References

Telemetry coverage

Rule body

id: '20368.36103'
title: Remote WMIC Query
description: 'An adversary can use WMI to interact with local and remote systems and
  use it as a means to execute various behaviors, such as gathering information for
  Discovery as well as remote Execution of files as part of Lateral Movement. This
  use case detects execution of WMIC commands with the ''/node'' switch, indicating
  potential remote operations or information gathering attempts on network endpoints.
  -- Threat Actor Association: Earth Estries, Flax Typhoon'
logic_format: Splunk
logic: '`get_endpoint_data` `get_endpoint_data_powershell` (TERM(EventCode=4103) OR
  "<EventID>4103<" OR TERM(EventCode=4104) OR "<EventID>4104<") (TERM(wmic) OR "wmic.exe")
  OR "/node:" | regex process="(?i)/node:" | table _time, host, user process, process_*,
  parent_* | bin span=1s | stats values(*) as * by _time, host '
techniques:
- execution:windows management instrumentation
technique_id: 
- T1047
data_category:
- PowerShell logs
- Process command-line parameters
references:
- https://thedfirreport.com/2023/06/12/a-truly-graceful-wipe-out/

Stages and Predicates

Stage 1: search

`get_endpoint_data` `get_endpoint_data_powershell` (TERM(EventCode=4103) OR "<EventID>4103<" OR TERM(EventCode=4104) OR "<EventID>4104<") (TERM(wmic) OR "wmic.exe") OR "/node:"

Stage 2: regex

| regex process="(?i)/node:"

Stage 3: table

| table _time, host, user process, process_*, parent_*

Stage 4: bucket

| bin span=1s

Stage 5: stats

| stats values(*) as * by _time, host

Indicators

These rows show field, operator, and value matches.

FieldKindValuesSearch
EventCodeeq
  • 4103 corpus 105 (splunk 105)
  • 4104 corpus 269 (splunk 269)
field:"EventID" kind:eq
processregex_match
  • "(?i)/node:" corpus 2 (splunk 2)
field:"CommandLine" kind:regex_match

Search terms

These SPL tokens match against raw event text.

StageTerm
1"<EventID>4103<"
1"<EventID>4104<"
1wmic
1"wmic.exe"
1"/node:"