Detection rules › Sigma
Azure Active Directory Connect credentials dump via network share
Detects scenarios where an attacker attempt to dump Azure Active Directory Connect credentials via network share.
MITRE ATT&CK coverage
| Tactic | Techniques |
|---|---|
| Credential Access | T1555 Credentials from Password Stores |
Event coverage
| Provider | Event | Title |
|---|---|---|
| Security-Auditing | Event ID 5145 | A network share object was checked to see whether client can be granted desired access. |
Rule body yaml
title: Azure Active Directory Connect credentials dump via network share
description: Detects scenarios where an attacker attempt to dump Azure Active Directory Connect credentials via network share.
references:
- https://github.com/fox-it/adconnectdump
- https://o365blog.com/post/adsync/
- https://dirkjanm.io/updating-adconnectdump-a-journey-into-dpapi/
tags:
- attack.credential_access
- attack.t1555
author: mdecrevoisier
status: experimental
logsource:
product: windows
service: security
detection:
selection:
EventID: 5145
ShareName: '\\*\C$'
RelativeTargetName|contains: '\Windows\ServiceProfiles\ADSync\AppData\Local\Microsoft\Credentials\'
condition: selection
falsepositives:
- None
level: high
Stages and Predicates
Stage 0: condition
selectionStage 1: selection
selection:
EventID: 5145
ShareName: '\\*\C$'
RelativeTargetName|contains: '\Windows\ServiceProfiles\ADSync\AppData\Local\Microsoft\Credentials\'
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 |
|---|---|---|
RelativeTargetName | match |
|
ShareName | wildcard |
|