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Description

This detection identifies access to PowerSploit modules that discover computers, servers and domains that can be accessed or taken over.

  • Type: TTP
  • Product: Splunk Behavioral Analytics
  • Datamodel:
  • Last Updated: 2020-11-06
  • Author: Stanislav Miskovic, Splunk
  • ID: fe1c4c5a-09f3-4b43-8129-560a7f38a08b

ATT&CK

ID Technique Tactic
T1592 Gather Victim Host Information Reconnaissance
T1590 Gather Victim Network Information Reconnaissance
T1087 Account Discovery Discovery

| from read_ssa_enriched_events()

| eval timestamp=parse_long(ucast(map_get(input_event, "_time"), "string", null)), cmd_line=ucast(map_get(input_event, "process"), "string", null), event_id=ucast(map_get(input_event, "event_id"), "string", null) 
| where cmd_line != null AND ( match_regex(cmd_line, /(?i)Get-ComputerDetail/)=true OR match_regex(cmd_line, /(?i)Get-Domain/)=true OR match_regex(cmd_line, /(?i)Get-NetDomain/)=true OR match_regex(cmd_line, /(?i)Get-DomainComputer/)=true OR match_regex(cmd_line, /(?i)Get-NetComputer/)=true OR match_regex(cmd_line, /(?i)Get-DomainController/)=true OR match_regex(cmd_line, /(?i)Get-NetDomainController/)=true OR match_regex(cmd_line, /(?i)Get-DomainFileServer/)=true OR match_regex(cmd_line, /(?i)Get-NetFileServer/)=true )

| eval start_time = timestamp, end_time = timestamp, entities = mvappend( ucast(map_get(input_event, "dest_user_id"), "string", null), ucast(map_get(input_event, "dest_device_id"), "string", null)), body=create_map(["event_id", event_id,  "cmd_line", cmd_line]) 
| into write_ssa_detected_events();

Associated Analytic Story

How To Implement

You must be ingesting Windows Security logs from devices of interest, including the event ID 4688 with enabled command line logging.

Required field

  • _time
  • process
  • dest_device_id
  • dest_user_id

Kill Chain Phase

  • Actions on Objectives

Known False Positives

None identified.

RBA

Risk Score Impact Confidence Message
80.0 80 100 PowerSploit malware is seaching for or accessing domain controllers, computers, file servers, etc. Operation is performed at the device $dest_device_id$, by the account $dest_user_id$ via command $cmd_line$

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

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