IMPORTANT: No additional bug fixes or documentation updates will be released for this version. For the latest information, see the current release documentation.

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Potential Escalation via Vulnerable MSI Repair

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Potential Escalation via Vulnerable MSI Repair

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Identifies when a browser process navigates to the Microsoft Help page followed by spawning an elevated process. This may indicate a successful exploitation for privilege escalation abusing a vulnerable Windows Installer repair setup.

Rule type: eql

Rule indices:

winlogbeat-*
endgame-*
logs-endpoint.events.process-*
logs-windows.sysmon_operational-*
logs-sentinel_one_cloud_funnel.*
logs-m365_defender.event-*

Severity: high

Risk score: 73

Runs every: 5m

Searches indices from: now-9m (Date Math format, see also Additional look-back time)

Maximum alerts per execution: 100

References:

Tags:

Domain: Endpoint
OS: Windows
Use Case: Threat Detection
Tactic: Privilege Escalation
Data Source: Elastic Endgame
Data Source: Elastic Defend
Data Source: Sysmon
Data Source: SentinelOne
Data Source: Microsoft Defender for Endpoint

Version: 102

Rule authors:

Elastic

Rule license: Elastic License v2

Rule query

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process where event.type == "start" and host.os.type == "windows" and
 user.domain : ("NT AUTHORITY", "AUTORITE NT", "AUTORIDADE NT") and
 process.parent.name : ("chrome.exe", "msedge.exe", "brave.exe", "whale.exe", "browser.exe", "dragon.exe", "vivaldi.exe",
                        "opera.exe", "iexplore", "firefox.exe", "waterfox.exe", "iexplore.exe", "tor.exe", "safari.exe") and
 process.parent.command_line : "*go.microsoft.com*"

Framework: MITRE ATT&CK^TM

Tactic:
- Name: Privilege Escalation
- ID: TA0004
- Reference URL: https://attack.mitre.org/tactics/TA0004/
Technique:
- Name: Exploitation for Privilege Escalation
- ID: T1068
- Reference URL: https://attack.mitre.org/techniques/T1068/
Tactic:
- Name: Defense Evasion
- ID: TA0005
- Reference URL: https://attack.mitre.org/tactics/TA0005/
Technique:
- Name: System Binary Proxy Execution
- ID: T1218
- Reference URL: https://attack.mitre.org/techniques/T1218/
Sub-technique:
- Name: Msiexec
- ID: T1218.007
- Reference URL: https://attack.mitre.org/techniques/T1218/007/

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