Active Directory Structure Export Via Csvde.EXE

Severity: medium
Author: Nasreddine Bencherchali (Nextron Systems)
Source: upstream

Detects the execution of "csvde.exe" in order to export organizational Active Directory structure.

MITRE ATT&CK coverage

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

Event coverage

Provider	Event ID	Title
Sysmon	1	Process creation

Stages and Predicates

Stage 1: `all of selection_img`

or:
Image|endswith: '\csvde.exe'
OriginalFileName: csvde.exe

Stage 2: `all of selection_remote`

CommandLine|contains: ' -f'

Stage 3: `not 1 of filter_import`

CommandLine|contains: ' -i'

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
`CommandLine`	match	`-f` corpus 3 (sigma 3) `-i` corpus 3 (sigma 3)
`Image`	ends_with	`\csvde.exe`
`OriginalFileName`	eq	`csvde.exe`