CSVDE Export Active Directory (Windows Event Log)

Group by: _time, host
Source: github.com/anvilogic-forge/armory

Detects the administration tool csvde.exe attempting to export Active Directory data in an APT scenario

MITRE ATT&CK coverage

Tactic	Techniques
Discovery	`T1087.001` Account Discovery: Local Account `T1087.002` Account Discovery: Domain Account

Telemetry coverage

Provider	Record / event type
Security-Auditing	Event ID 4688: A new process has been created.

Rule body

id: '1028.1031'
title: CSVDE Export Active Directory
description: 'Detects the administration tool csvde.exe attempting to export Active
  Directory data in an APT scenario. -- Threat Actor Association: Volt Typhoon'
logic_format: Splunk
logic: ' `get_endpoint_data` `get_endpoint_data_winevent` (TERM(EventCode=4688) OR
  "<EventID>4688<" OR Type=Process) ("csvde.exe" AND TERM(-f)) | table _time, host,
  user dest_ip, dest_port, direction, dvc, dvc_nt_host, event_id, host, index, parent_process,
  parent_process_id, parent_process_name, parent_process_path, process, process_id,
  process_name, process_path, signature_id, source, sourcetype, src_ip, src_port,
  tag, transport, user | bin span=30s | stats values(*) as * by _time, host '
techniques:
- discovery:account discovery:local account
- discovery:account discovery:domain account
technique_id:
- T1087.001
- T1087.002
data_category:
- Windows event logs
references: null

Stages and Predicates

Stage 1: `search`

`get_endpoint_data` `get_endpoint_data_winevent` (TERM(EventCode=4688) OR "<EventID>4688<" OR Type=Process) ("csvde.exe" AND TERM(-f))

Stage 2: `table`

| table _time, host, user dest_ip, dest_port, direction, dvc, dvc_nt_host, event_id, host, index, parent_process, parent_process_id, parent_process_name, parent_process_path, process, process_id, process_name, process_path, signature_id, source, sourcetype, src_ip, src_port, tag, transport, user

Stage 3: `bucket`

| bin span=30s

Stage 4: `stats`

| stats values(*) as * by _time, host

Indicators

These rows show field, operator, and value matches.

Field	Kind	Values	Search
`EventCode`	eq	`4688` corpus 317 (splunk 283, kusto 33, elastic 1)	`field:"EventID" kind:eq value:"4688"`

Search terms

These SPL tokens match against raw event text.

Stage	Term
1	`"<EventID>4688<"`
1	`"csvde.exe"`
1	`"-f"`