Potential PrintNightmare File Modification
Warning
This rule has been deprecated as of 2022/03/16.
Detects the creation or modification of a print driver with an unusual file name. This may indicate 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:
- winlogbeat-*
- logs-endpoint.events.*
- logs-windows.*
Rule Severity: high
Risk Score: 73
Runs every:
Searches indices from: now-9m
Maximum alerts per execution: 100
References:
- https://msrc.microsoft.com/update-guide/vulnerability/CVE-2021-34527
- https://github.com/afwu/PrintNightmare
Tags:
- Elastic
- Host
- Windows
- Threat Detection
- Privilege Escalation
Version: 100
Rule authors:
- Elastic
Rule license: Elastic License v2
/* This rule is compatible with both Sysmon and Elastic Endpoint */
file where process.name : "spoolsv.exe" and
file.name : ("kernelbase.dll", "ntdll.dll", "kernel32.dll", "winhttp.dll", "user32.dll") and
file.path : "?:\\Windows\\System32\\spool\\drivers\\x64\\3\\*"
Framework: MITRE ATT&CK
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/