IMPORTANT: No additional bug fixes or documentation updates
will be released for this version. For the latest information, see the
current release documentation.
Potential PrintNightmare Exploit Registry Modificationedit
Detects attempts to exploit privilege escalation vulnerabilities related to the Print Spooler service. For more information refer to CVE-2021-34527 and verify that the impacted system is investigated.
Rule type: eql
Rule indices:
- 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: 1
Added (Elastic Stack release): 7.14.0
Rule authors: Elastic
Rule license: Elastic License v2
Rule queryedit
/* This rule is not compatible with Sysmon due to schema issues */
registry where process.name : "spoolsv.exe" and (registry.path : "HK
LM\\SYSTEM\\ControlSet*\\Control\\Print\\Environments\\Windows*\\Drive
rs\\Version-3\\mimikatz*\\Data File" or (registry.path : "HKLM\\SYST
EM\\ControlSet*\\Control\\Print\\Environments\\Windows*\\Drivers\\Vers
ion-3\\*\\Configuration File" and registry.data.strings :
("kernelbase.dll", "ntdll.dll", "kernel32.dll", "winhttp.dll",
"user32.dll")))
Threat mappingedit
Framework: MITRE ATT&CKTM
-
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/