Possible CVE-2021-1675 Print Spooler Exploitation

calendar Oct 15, 2023 · attack.execution attack.t1569 cve.2021.1675 detection.emerging_threats  ·
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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

Sigma rule (View on GitHub)

 1title: Possible CVE-2021-1675 Print Spooler Exploitation
 2id: 4e64668a-4da1-49f5-a8df-9e2d5b866718
 3status: test
 4description: 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
 5references:
 6    - https://github.com/hhlxf/PrintNightmare
 7    - https://github.com/afwu/PrintNightmare
 8    - https://twitter.com/fuzzyf10w/status/1410202370835898371
 9author: Florian Roth (Nextron Systems), KevTheHermit, fuzzyf10w, Tim Shelton
10date: 2021/06/30
11modified: 2022/11/15
12tags:
13    - attack.execution
14    - attack.t1569
15    - cve.2021.1675
16    - detection.emerging_threats
17logsource:
18    product: windows
19    service: printservice-admin
20detection:
21    selection:
22        EventID: 808
23        ErrorCode:
24            - '0x45A'
25            - '0x7e'
26    keywords:
27        - 'The print spooler failed to load a plug-in module'
28        # default file names used in PoC codes
29        - 'MyExploit.dll'
30        - 'evil.dll'
31        - '\addCube.dll'
32        - '\rev.dll'
33        - '\rev2.dll'
34        - '\main64.dll'
35        - '\mimilib.dll'
36        - '\mimispool.dll'
37    falsepositive:
38        - ' registration timed out' # ex: The print spooler failed to load a plug-in module PrintConfig registration timed out
39    condition: (selection or keywords) and not falsepositive
40fields:
41    - PluginDllName
42falsepositives:
43    - Problems with printer drivers
44level: high

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