:no_entry: THIS IS A DEPRECATED DETECTION

This detection has been marked deprecated by the Splunk Threat Research team. This means that it will no longer be maintained or supported.

Try in Splunk Security Cloud

Description

The following analytic identifies the use of CacheDump with the -v parameter to dump cached credentials on the associated endpoint. Adversaries use Cachedump as it is a publicly-available tool that extracts cached password hashes from a system's registry.

  • Type: TTP
  • Product: Splunk Behavioral Analytics
  • Datamodel: Endpoint_Processes
  • Last Updated: 2021-11-29
  • Author: Stanislav Miskovic, Splunk
  • ID: 3c40b0ef-a03f-460a-9484-e4b9117cbb38

Annotations

ATT&CK

ATT&CK

ID Technique Tactic
T1003 OS Credential Dumping Credential Access
T1003.002 Security Account Manager Credential Access
Kill Chain Phase
  • Actions on Objectives
NIST
  • PR.AC
  • PR.IP
CIS20
  • CIS 16
CVE 


1
2
3
4
5
6
7
8



 
| 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), process_name=ucast(map_get(input_event, "process_name"), "string", null), process_path=ucast(map_get(input_event, "process_path"), "string", null), event_id=ucast(map_get(input_event, "event_id"), "string", null) 
| where cmd_line != null AND process_name != null AND process_path != null AND match_regex(process_name, /(?i)cachedump\d{0,2}.exe/)=true AND match_regex(process_path, /(?i)\\Temp/)=true AND match_regex(cmd_line, /(?i)\-v/)=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, "process_name", process_name]) 
| into write_ssa_detected_events();

Macros

The SPL above uses the following Macros:

:information_source: credential_extractionfgdump_and_cachedump_filter is a empty macro by default. It allows the user to filter out any results (false positives) without editing the SPL.

Required fields

List of fields required to use this analytic.

  • dest_device_id
  • process_name
  • _time
  • process_path
  • dest_user_id
  • process
  • cmd_line

How To Implement

To successfully implement this search, you need to be ingesting logs with the process name, parent process, and command-line executions from your endpoints. If you are using Sysmon, you must have at least version 6.0.4 of the Sysmon TA.

Known False Positives

False positives will be limited as this analytic targets specific credential dumping process names. Filter as needed.

Associated Analytic Story

RBA

Risk Score Impact Confidence Message
63.0 70 90 Malicious actor is accessing stored credentials via FGDump or CacheDump tools. Operation is performed at the device $dest_device_id$, by the account $dest_user_id$ via process $process_name$

:information_source: The Risk Score is calculated by the following formula: Risk Score = (Impact * Confidence/100). Initial Confidence and Impact is set by the analytic author.

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: 2