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Privilege Escalation via Windir Environment Variable
editPrivilege Escalation via Windir Environment Variable
editIdentifies a privilege escalation attempt via a rogue Windows directory (Windir) environment variable. This is a known primitive that is often combined with other vulnerabilities to elevate privileges.
Rule type: eql
Rule indices:
- logs-endpoint.events.*
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: 100 (version history)
Added (Elastic Stack release): 7.11.0
Last modified (Elastic Stack release): 8.5.0
Rule authors: Elastic
Rule license: Elastic License v2
Rule query
editregistry where registry.path : ("HKEY_USERS\\*\\Environment\\windir", "HKEY_USERS\\*\\Environment\\systemroot") and not registry.data.strings : ("C:\\windows", "%SystemRoot%")
Threat mapping
editFramework: MITRE ATT&CKTM
-
Tactic:
- Name: Privilege Escalation
- ID: TA0004
- Reference URL: https://attack.mitre.org/tactics/TA0004/
-
Technique:
- Name: Hijack Execution Flow
- ID: T1574
- Reference URL: https://attack.mitre.org/techniques/T1574/
Rule version history
edit- Version 100 (8.5.0 release)
-
-
Updated query, changed from:
registry where registry.path : ("HKEY_USERS\\*\\Environment\\windir", "HKEY_USERS\\*\\Environment\\systemroot") and not registry.data.strings : ("C:\\windows", "%SystemRoot%")
-
- Version 5 (8.4.0 release)
-
- Formatting only
- Version 4 (8.1.0 release)
-
- Formatting only
- Version 3 (7.12.0 release)
-
- Formatting only
- Version 2 (7.11.2 release)
-
- Formatting only