Try in Splunk Security Cloud

Description

This detection identifies access to PowerSploit modules that illegaly elevate general privileges or ensure persistence, e.g., enable manipulation of registry, task scheduling, persistent WMI, access to OS objects under desired identities.

  • Type: TTP
  • Product: Splunk Behavioral Analytics
  • Datamodel:
  • Last Updated: 2020-11-09
  • Author: Stanislav Miskovic, Splunk
  • ID: 88c10ee9-fe72-4bce-b343-5b129044b991

ATT&CK

ID Technique Tactic
T1053 Scheduled Task/Job Execution, Persistence, Privilege Escalation
T1134 Access Token Manipulation Defense Evasion, Privilege Escalation
T1548 Abuse Elevation Control Mechanism Privilege Escalation, Defense Evasion

| 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)Add-DomainObjectAcl/)=true OR match_regex(cmd_line, /(?i)Add-ObjectAcl/)=true OR match_regex(cmd_line, /(?i)Enable-Privilege/)=true OR match_regex(cmd_line, /(?i)New-ElevatedPersistenceOption/)=true OR match_regex(cmd_line, /(?i)New-UserPersistenceOption/)=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

  • dest_device_id
  • dest_user_id
  • process
  • _time

Kill Chain Phase

  • Actions on Objectives

Known False Positives

None identified.

RBA

Risk Score Impact Confidence Message
90.0 90 100 PowerSploit malware is planting attack persistence elements, altering privileges and access controls. 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

source | version: 1