Sigma rule: CVE-2021-1675 Print Spooler Exploitation

A detection rule from the SigmaHQ repository, shown as its author published it. Dataset version ref-9da43ff8ed61, updated 2022-10-09T00:00:00.000Z.

Rule

Title
CVE-2021-1675 Print Spooler Exploitation
Status
test
Level
critical
Author
Florian Roth (Nextron Systems)
Date
2021-07-01
Modified
2022-10-09
File
rules-emerging-threats/2021/Exploits/CVE-2021-1675/win_exploit_cve_2021_1675_printspooler_operational.yml
Commit
ccbb0369507f796db0b0ae6854c8a2be471b9d84

Detects driver load events print service operational log that are a sign of successful exploitation attempts against print spooler vulnerability CVE-2021-1675

Log source

product
windows
service
printservice-operational

Detection

selection:
    EventID: 316
keywords:
    - 'UNIDRV.DLL, kernelbase.dll, '
    - ' 123 '
    - ' 1234 '
    - 'mimispool'
condition: selection and keywords

False positives (as the rule lists them)

  • Unknown

Tags

  • attack.execution
  • attack.t1569
  • cve.2021-1675
  • detection.emerging-threats

CVEs this rule names

MITRE ATT&CK ids this rule names

References

Read on 2026-11-03T00:58:21.399Z under licence sigma-drl-1.1@d5f4c36a from https://github.com/SigmaHQ/sigma/blob/ccbb0369507f796db0b0ae6854c8a2be471b9d84/rules-emerging-threats/2021/Exploits/CVE-2021-1675/win_exploit_cve_2021_1675_printspooler_operational.yml

Sources and licences

  • SigmaHQ

    "CVE-2021-1675 Print Spooler Exploitation" by Florian Roth (Nextron Systems) (SigmaHQ). Rule: https://github.com/SigmaHQ/sigma/blob/ccbb0369507f796db0b0ae6854c8a2be471b9d84/rules-emerging-threats/2021/Exploits/CVE-2021-1675/win_exploit_cve_2021_1675_printspooler_operational.yml.
    Licensed under the Detection Rule License (DRL) 1.1: https://github.com/SigmaHQ/Detection-Rule-License

    Detection Rule License (DRL) 1.1

Cite this page

Dragons Eye Ransomware Tracker, "Sigma rule: CVE-2021-1675 Print Spooler Exploitation",
entity page, dataset version ref-9da43ff8ed61, updated 2022-10-09T00:00:00.000Z,
https://ransomware-tracker.com/detections/sigma/f34d942d-c8c4-4f1f-b196-22471aecf10a (accessed 2026-11-03).
Underlying source: SigmaHQ rule f34d942d-c8c4-4f1f-b196-22471aecf10a, commit ccbb0369507f796db0b0ae6854c8a2be471b9d84.

Pages change. The dataset version identifies the data, but no archive of old versions is kept, so this citation cannot be replayed later.