Detection rules › Splunk
CSVDE Export Active Directory (Windows Event Log)
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 |
Event coverage
| Provider | Event | Title |
|---|---|---|
| Security-Auditing | Event ID 4688 | A new process has been created. |
Rule body yaml
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
Each row is a field, operator, and value that the rule matches. The corpus column counts how many other rules in the catalog look for the same combination: high numbers point to widely-used, community-vetted indicators. Blank or 1 shows that the indicator is specific to this rule.
| Field | Kind | Values |
|---|---|---|
EventCode | eq |
|
Search terms
Bare-string tokens in the SPL search body. Splunk matches each token against _raw (the untyped raw event text) anywhere it appears, not against a specific field. These don't surface in the Indicators table because they aren't predicates on a known field.
| Stage | Term |
|---|---|
| 1 | TERM |
| 1 | "<EventID>4688<" |
| 1 | "csvde.exe" |
| 1 | "-f" |