Detection rules › Splunk

Adfind Execution (PowerShell)

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

AdFind is a free command-line query tool that can be used for gathering information from Active Directory. This use case looks for process executions of Adfind

MITRE ATT&CK coverage

References

Telemetry coverage

Rule body

id: '6143.6641'
title: Adfind Execution
description: 'AdFind is a free command-line query tool that can be used for gathering
  information from Active Directory. This use case looks for process executions of
  Adfind. -- Threat Actor Association: APT29/Nobelium/Cozy Bear, APT31, BlackMatter,
  Conti, DarkSide, FIN6, FIN7, FIN12, Karakurt, Lazarus, Traveling Spider, Wizard
  Spider, Yanluowang - Software Association: ALPHV/BlackCat, BazarLoader, Conti, Dridex,
  Entropy, Lockbit, Nefilim, Quantum, Sodinokibi/REvil - Atomics T1016 Test #6 Atomics
  T1018 Test#10 Atomics T1018 Test#11 Atomics T1069.002 Test #8 Atomics T1087.002
  Test #5 Atomics T1087.002 Test #6 Atomics T1087.002 Test #7 Atomics T1087.002 Test
  #8'
logic_format: Splunk
logic: '`get_endpoint_data` `get_endpoint_data_powershell` (TERM(EventCode=4103) OR
  TERM(EventCode=4104) OR TERM(<EventID>4103<) OR TERM(<EventID>4104<)) "adfind" |
  table _time, host, user user, process, process_name | bin span=5s | stats values(*)
  as * by _time, host | where event_count > 0 '
techniques:
- discovery:account discovery:domain account
- discovery:permission groups discovery:domain groups
- discovery:domain trust discovery
- discovery:system network configuration discovery
- discovery:remote system discovery
technique_id:
- T1087.002
- T1069.002
- T1482
- T1016
- T1018
data_category:
- PowerShell logs
- Process command-line parameters
references:
- https://redcanary.com/blog/how-one-hospital-thwarted-a-ryuk-ransomware-outbreak/
- https://thedfirreport.com/2020/10/08/ryuks-return/
- https://www.fireeye.com/blog/threat-research/2019/04/pick-six-intercepting-a-fin6-intrusion.html

Stages and Predicates

Stage 1: search

`get_endpoint_data` `get_endpoint_data_powershell` (TERM(EventCode=4103) OR TERM(EventCode=4104) OR TERM(<EventID>4103<) OR TERM(<EventID>4104<)) "adfind"

Stage 2: table

| table _time, host, user user, process, process_name

Stage 3: bucket

| bin span=5s

Stage 4: stats

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

Stage 5: where

| where event_count > 0

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
event_countgt
  • 0 corpus 3 (splunk 3)
field:"event_count" kind:gt value:"0"

Search terms

These SPL tokens match against raw event text.

StageTerm
1"<EventID>4103<"
1"<EventID>4104<"
1"adfind"