Try in Splunk Security Cloud

Description

This detection identifies access to PowerSploit modules that discover and access network and distributed file system shares.

  • Type: TTP
  • Product: Splunk Behavioral Analytics
  • Datamodel:
  • Last Updated: 2020-11-06
  • Author: Stanislav Miskovic, Splunk
  • ID: 6b7ca431-6b1e-4b40-9589-21cb368e369e

ATT&CK

ID Technique Tactic
T1021 Remote Services Lateral Movement
T1039 Data from Network Shared Drive Collection
T1135 Network Share Discovery Discovery
T1021.002 SMB/Windows Admin Shares Lateral Movement

| 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-DomainShare/)=true OR match_regex(cmd_line, /(?i)Invoke-ShareFinder/)=true OR match_regex(cmd_line, /(?i)Find-InterestingDomainShareFile/)=true OR match_regex(cmd_line, /(?i)Invoke-FileFinder/)=true OR match_regex(cmd_line, /(?i)Find-InterestingFile/)=true OR match_regex(cmd_line, /(?i)Get-DomainDFSShare/)=true OR match_regex(cmd_line, /(?i)Get-DFSshare/)=true OR match_regex(cmd_line, /(?i)Get-NetShare/)=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
70.0 70 100 PowerSploit malware is searching for and accessing network shares. 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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