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Description

This detection identifies use of PowerSploit modules for assessment of presence of defensive tools.

  • Type: TTP
  • Product: Splunk Behavioral Analytics
  • Datamodel:
  • Last Updated: 2020-11-05
  • Author: Stanislav Miskovic, Splunk
  • ID: 24b4e659-63a2-4e7b-89ac-87dd659c7110

ATT&CK

ID Technique Tactic
T1592.002 Software Reconnaissance
T1595.002 Vulnerability Scanning Reconnaissance
T1592 Gather Victim Host Information Reconnaissance
T1595 Active Scanning Reconnaissance

| 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)Find-AVSignature/)=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
40.0 40 100 PowerSploit malware is looking for presence of anti virus software. 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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