Sigma rule: Possible CVE-2021-1675 Print Spooler Exploitation

A detection rule from the SigmaHQ repository, shown as its author published it. Dataset version ref-3d98a4e8fe93, updated 2022-11-15T00:00:00.000Z.

Rule

Title
Possible CVE-2021-1675 Print Spooler Exploitation
Status
test
Level
high
Author
Florian Roth (Nextron Systems), KevTheHermit, fuzzyf10w, Tim Shelton
Date
2021-06-30
Modified
2022-11-15
File
rules-emerging-threats/2021/Exploits/CVE-2021-1675/win_exploit_cve_2021_1675_printspooler.yml
Commit
ccbb0369507f796db0b0ae6854c8a2be471b9d84

Detects events of driver load errors in print service logs that could be a sign of successful exploitation attempts of print spooler vulnerability CVE-2021-1675

Log source

product
windows
service
printservice-admin

Detection

selection:
    EventID: 808
    ErrorCode:
        - '0x45A'
        - '0x7e'
keywords:
    - 'The print spooler failed to load a plug-in module'
    # default file names used in PoC codes
    - 'MyExploit.dll'
    - 'evil.dll'
    - '\addCube.dll'
    - '\rev.dll'
    - '\rev2.dll'
    - '\main64.dll'
    - '\mimilib.dll'
    - '\mimispool.dll'
falsepositive:
    - ' registration timed out' # ex: The print spooler failed to load a plug-in module PrintConfig registration timed out
condition: (selection or keywords) and not falsepositive

False positives (as the rule lists them)

  • Problems with printer drivers

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.yml

Sources and licences

  • SigmaHQ

    "Possible CVE-2021-1675 Print Spooler Exploitation" by Florian Roth (Nextron Systems), KevTheHermit, fuzzyf10w, Tim Shelton (SigmaHQ). Rule: https://github.com/SigmaHQ/sigma/blob/ccbb0369507f796db0b0ae6854c8a2be471b9d84/rules-emerging-threats/2021/Exploits/CVE-2021-1675/win_exploit_cve_2021_1675_printspooler.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: Possible CVE-2021-1675 Print Spooler Exploitation",
entity page, dataset version ref-3d98a4e8fe93, updated 2022-11-15T00:00:00.000Z,
https://ransomware-tracker.com/detections/sigma/4e64668a-4da1-49f5-a8df-9e2d5b866718 (accessed 2026-11-03).
Underlying source: SigmaHQ rule 4e64668a-4da1-49f5-a8df-9e2d5b866718, 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.