Detection rules › Splunk

Adfind Commands (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. In some instances Adversaries have renamed adfind in order to avoid detection. This use case looks for common commands of Adfind

MITRE ATT&CK coverage

References

Telemetry coverage

Rule body

id: '6146.6664'
title: Adfind Commands
description: 'AdFind is a free command-line query tool that can be used for gathering
  information from Active Directory. In some instances Adversaries have renamed adfind
  in order to avoid detection. This use case looks for common commands of Adfind.
  -- Threat Actor Association: APT29/Nobelium/Cozy Bear, BlackMatter, Conti, DarkSide,
  FIN6, FIN7, FIN12, Karakurt, Mustang Panda (aka. Stately Taurus//Earth Preta/BRONZE
  PRESIDENT/TA416/RedDelta), Traveling Spider, Wizard Spider, Yanluowang -- Software
  Association: BazarLoader, Blackcat/ALPHV, Conti, DatopLoader, Dridex, Entropy, Lockbit,
  Nefilim, Quantum, Sodinokibi/REvil, Trickbot, XingLocker'
logic_format: Splunk
logic: '`get_endpoint_data` `get_endpoint_data_powershell` (TERM(EventCode=4104) OR
  "<EventID>4104<" OR TERM(EventCode=4103) OR "<EventID>4103<") ("objectcategory"
  OR "trustdmp" OR ("member" "list")) | regex process="(?i)(objectcategory|trustdmp|member.*?\s+\-list)"
  | table _time, host, user user, process, process_name | bin span=1s | stats values(*)
  as * by _time, host '
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://www.microsoft.com/security/blog/2020/12/18/analyzing-solorigate-the-compromised-dll-file-that-started-a-sophisticated-cyberattack-and-how-microsoft-defender-helps-protect/

Stages and Predicates

Stage 1: search

`get_endpoint_data` `get_endpoint_data_powershell` (TERM(EventCode=4104) OR "<EventID>4104<" OR TERM(EventCode=4103) OR "<EventID>4103<") ("objectcategory" OR "trustdmp" OR ("member" "list"))

Stage 2: regex

| regex process="(?i)(objectcategory|trustdmp|member.*?\s+\-list)"

Stage 3: table

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

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)(objectcategory|trustdmp|member.*?\s+\-list)"
field:"CommandLine" kind:regex_match

Search terms

These SPL tokens match against raw event text.

StageTerm
1"<EventID>4104<"
1"<EventID>4103<"
1"objectcategory"
1"trustdmp"
1"member"
1"list"