Active Directory Structure Export Via Ldifde.EXE

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

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

Event coverage

Provider	Event ID	Title
Sysmon	1	Process creation

Stages and Predicates

Stage 1: `all of selection_ldif`

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

Stage 2: `all of selection_cmd`

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	`-i` corpus 3 (sigma 3) `-f` corpus 5 (sigma 5)
`Image`	ends_with	`\ldifde.exe` corpus 3 (sigma 3)
`OriginalFileName`	eq	`ldifde.exe` corpus 2 (sigma 2)