Detection rules › Sigma
Potential NTLM Coercion Via Certutil.EXE
Detects possible NTLM coercion via certutil using the 'syncwithWU' flag
MITRE ATT&CK coverage
| Tactic | Techniques |
|---|---|
| Stealth |
Telemetry coverage
| Provider | Record / event type |
|---|---|
| Sysmon | Event ID 1: Process creation |
Rule body
title: Potential NTLM Coercion Via Certutil.EXE
id: 6c6d9280-e6d0-4b9d-80ac-254701b64916
status: test
description: Detects possible NTLM coercion via certutil using the 'syncwithWU' flag
references:
- https://github.com/LOLBAS-Project/LOLBAS/issues/243
author: Nasreddine Bencherchali (Nextron Systems)
date: 2022-09-01
modified: 2023-02-14
tags:
- attack.stealth
- attack.t1218
logsource:
category: process_creation
product: windows
detection:
selection_img:
- Image|endswith: '\certutil.exe'
- OriginalFileName: 'CertUtil.exe'
selection_cli:
CommandLine|contains|all:
- ' -syncwithWU '
- ' \\\\'
condition: all of selection_*
falsepositives:
- Unknown
level: high
regression_tests_path: regression_data/rules/windows/process_creation/proc_creation_win_certutil_ntlm_coercion/info.yml
Stages and Predicates
Stage 0: condition
all of selection_*Stage 1: selection_img
selection_img:
- Image|endswith: '\certutil.exe'
- OriginalFileName: 'CertUtil.exe'
Stage 2: selection_cli
selection_cli:
CommandLine|contains|all:
- ' -syncwithWU '
- ' \\\\'
Indicators
These rows show field, operator, and value matches.
| Field | Kind | Values | Search |
|---|---|---|---|
CommandLine | match |
| field:"CommandLine" kind:match |
Image | ends_with |
| field:"Image" kind:ends_with value:"\certutil.exe" |
OriginalFileName | eq |
| field:"OriginalFileName" kind:eq value:"CertUtil.exe" |