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UAC Bypass Attempt via Privileged IFileOperation COM Interfaceedit
Identifies attempts to bypass User Account Control (UAC) via DLL side-loading. Attackers may attempt to bypass UAC to stealthily execute code with elevated permissions.
Rule type: eql
Rule indices:
- winlogbeat-*
- logs-endpoint.events.*
- logs-windows.*
Severity: high
Risk score: 73
Runs every: 5 minutes
Searches indices from: now-9m (Date Math format, see also Additional look-back time
)
Maximum alerts per execution: 100
References:
Tags:
- Elastic
- Host
- Windows
- Threat Detection
- Privilege Escalation
Version: 101 (version history)
Added (Elastic Stack release): 7.11.0
Last modified (Elastic Stack release): 8.6.0
Rule authors: Elastic
Rule license: Elastic License v2
Investigation guideedit
Rule queryedit
file where event.type : "change" and process.name : "dllhost.exe" and /* Known modules names side loaded into process running with high or system integrity level for UAC Bypass, update here for new modules */ file.name : ("wow64log.dll", "comctl32.dll", "DismCore.dll", "OskSupport.dll", "duser.dll", "Accessibility.ni.dll") and /* has no impact on rule logic just to avoid OS install related FPs */ not file.path : ("C:\\Windows\\SoftwareDistribution\\*", "C:\\Windows\\WinSxS\\*")
Threat mappingedit
Framework: MITRE ATT&CKTM
-
Tactic:
- Name: Privilege Escalation
- ID: TA0004
- Reference URL: https://attack.mitre.org/tactics/TA0004/
-
Technique:
- Name: Abuse Elevation Control Mechanism
- ID: T1548
- Reference URL: https://attack.mitre.org/techniques/T1548/
Rule version historyedit
- Version 101 (8.6.0 release)
-
- Formatting only
- Version 100 (8.5.0 release)
-
- Formatting only
- Version 7 (8.4.0 release)
-
- Formatting only
- Version 5 (8.2.0 release)
-
- Formatting only
- Version 4 (7.15.0 release)
-
- Formatting only
- Version 3 (7.12.0 release)
-
- Formatting only
- Version 2 (7.11.2 release)
-
- Formatting only