Windows Registry Set of ms-msdt MSProtocol URI (CVE-2022-30190)
Alerts on Windows registry writes under HKCR\ms-msdt\ that may indicate MSDT protocol abuse.
FreeReviewedSigma · Medium · v5
- Product
- windows
- Category
- registry_set
- Author
- Sittikorn S (SigmaHQ), DRL 1.1
- Published
- 2020-05-31
- Updated
- 2026-07-31
ATT&CK techniques
Defense EvasionRecon
Resource Dev
Initial Access
Execution
Persistence
Priv Esc
Defense Evasion
Cred Access
Discovery
Lateral Movement
Collection
C2
Exfiltration
Impact
What it detects
This rule flags registry value writes under HKCR\ms-msdt\ that set up the MSProtocol URI scheme. Attackers may use this scheme handler registration to trigger unwanted behavior tied to CVE-2022-30190-style exploitation attempts. The detection relies on Windows registry set telemetry that captures the TargetObject path beginning with HKCR\ms-msdt\.
Reporting behind it
- msrc.microsoft.comhttps://msrc.microsoft.com/update-guide/vulnerability/CVE-2022-30190
- msrc-blog.microsoft.comhttps://msrc-blog.microsoft.com/2022/05/30/guidance-for-cve-2022-30190-microsoft-support-diagnostic-tool-vulnerability/
- github.comhttps://github.com/SigmaHQ/sigma/blob/master/rules-emerging-threats/2022/Exploits/CVE-2022-30190/registry_set_exploit_cve_2022_30190_msdt_follina.yml
Changelog
v5- v5Candidate ingested via manual entry.2026-07-31
- v4Candidate ingested via manual entry.2026-07-31
- v3Candidate ingested via manual entry.2026-07-31
- v2Candidate ingested via manual entry.2026-07-31
- v1No changelog recorded for this version.2026-07-30
Detection content is published as a reviewed draft. Tune thresholds and exclusions against your own telemetry before enabling this rule for alerting.
windows-registry-suspicious-hkcr-ms-msdt-setvalue-for-msdt-protocol-2d9403d5
title: Windows Registry Set of ms-msdt MSProtocol URI (CVE-2022-30190)
id: 5094eb0b-2a40-4620-8f2d-3d1c4939aae6
status: test
description: This rule flags registry value writes under HKCR\ms-msdt\ that set up the MSProtocol URI scheme. Attackers may use this scheme handler registration to trigger unwanted behavior tied to CVE-2022-30190-style exploitation attempts. The detection relies on Windows registry set telemetry that captures the TargetObject path beginning with HKCR\ms-msdt\.
references:
- https://msrc.microsoft.com/update-guide/vulnerability/CVE-2022-30190
- https://msrc-blog.microsoft.com/2022/05/30/guidance-for-cve-2022-30190-microsoft-support-diagnostic-tool-vulnerability/
- https://github.com/SigmaHQ/sigma/blob/master/rules-emerging-threats/2022/Exploits/CVE-2022-30190/registry_set_exploit_cve_2022_30190_msdt_follina.yml
author: Sittikorn S, Huntrule Team
date: 2020-05-31
modified: 2023-08-17
tags:
- attack.stealth
- attack.t1221
- detection.emerging-threats
logsource:
product: windows
category: registry_set
detection:
selection:
TargetObject|startswith: HKCR\ms-msdt\
condition: selection
falsepositives:
- Unknown
level: medium
license: DRL-1.1
related:
- id: 2d9403d5-7927-46b7-8216-37ab7c9ec5e3
type: derived