Elastic Security Detection Rules

Outlook Home Page Registry Modification

Last updated 12 days ago on 2025-06-12
Created a year ago on 2024-08-01

About

Identifies modifications in registry keys associated with abuse of the Outlook Home Page functionality for command and control or persistence.
Tags
Domain: EndpointOS: WindowsUse Case: Threat DetectionTactic: Command and ControlTactic: PersistenceData Source: Elastic EndgameData Source: Elastic DefendData Source: SysmonData Source: Microsoft Defender for EndpointData Source: SentinelOneLanguage: eql
Severity
medium
Risk Score
47
MITRE ATT&CK™

Command and Control (TA0011)(opens in a new tab or window)

Persistence (TA0003)(opens in a new tab or window)

↳ Office Application Startup (T1137)(opens in a new tab or window)

License
Elastic License v2(opens in a new tab or window)

Definition

Rule Type
Event Correlation Rule
Integration Pack
Prebuilt Security Detection Rules
Index Patterns
winlogbeat-*logs-endpoint.events.registry-*logs-windows.sysmon_operational-*endgame-*logs-m365_defender.event-*logs-sentinel_one_cloud_funnel.*
Related Integrations

endpoint(opens in a new tab or window)

windows(opens in a new tab or window)

m365_defender(opens in a new tab or window)

sentinel_one_cloud_funnel(opens in a new tab or window)

Query
registry where host.os.type == "windows" and event.action != "deletion" and registry.value : "URL" and
    registry.path : (
        "*\\SOFTWARE\\Microsoft\\Office\\*\\Outlook\\Webview\\*",
        "*\\SOFTWARE\\Microsoft\\Office\\*\\Outlook\\Today\\*"
    ) and registry.data.strings : "*://*"

Install detection rules in Elastic Security

Detect Outlook Home Page Registry Modification in the Elastic Security detection engine by installing this rule into your Elastic Stack.

To setup this rule, check out the installation guide for Prebuilt Security Detection Rules(opens in a new tab or window).