PaperCut MF/NG Potential Exploitation

calendar Jun 20, 2023 · attack.execution detection.emerging_threats  ·
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Detects suspicious child processes of "pc-app.exe". Which could indicate potential exploitation of PaperCut

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 1title: PaperCut MF/NG Potential Exploitation
 2id: 0934ac71-a331-4e98-a034-d49c491fbbcb
 3status: test
 4description: Detects suspicious child processes of "pc-app.exe". Which could indicate potential exploitation of PaperCut
 5references:
 6    - https://www.huntress.com/blog/critical-vulnerabilities-in-papercut-print-management-software
 7    - https://github.com/huntresslabs/threat-intel/blob/main/2023/2023-04/20-PaperCut/win_susp_papercut_code_execution.yml
 8author: Nasreddine Bencherchali (Nextron Systems), Huntress DE&TH Team (idea)
 9date: 2023/04/20
10modified: 2023/04/25
11tags:
12    - attack.execution
13    - detection.emerging_threats
14logsource:
15    category: process_creation
16    product: windows
17detection:
18    selection:
19        ParentImage|endswith: '\pc-app.exe'
20        Image|endswith:
21            - '\bash.exe'
22            - '\calc.exe'
23            - '\certutil.exe'
24            - '\cmd.exe'
25            - '\csc.exe'
26            - '\cscript.exe'
27            - '\dllhost.exe'
28            - '\mshta.exe'
29            - '\msiexec.exe'
30            - '\powershell.exe'
31            - '\pwsh.exe'
32            - '\regsvr32.exe'
33            - '\rundll32.exe'
34            - '\scriptrunner.exe'
35            - '\wmic.exe'
36            - '\wscript.exe'
37            - '\wsl.exe'
38    condition: selection
39falsepositives:
40    - Legitimate administration activity
41level: high

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