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: 202

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&CKTM