Nasreddine Bencherchali
598d29f811
chore: change tags, date, modified fields to comply with v2 of the Sigma spec. chore: update the related type from `obsoletes` to `obsolete`. chore: update local json schema to the latest version.
31 lines
1.1 KiB
YAML
31 lines
1.1 KiB
YAML
title: Network Connection Initiated Via Notepad.EXE
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id: e81528db-fc02-45e8-8e98-4e84aba1f10b
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status: test
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description: |
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Detects a network connection that is initiated by the "notepad.exe" process.
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This might be a sign of process injection from a beacon process or something similar.
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Notepad rarely initiates a network communication except when printing documents for example.
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references:
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- https://web.archive.org/web/20200219102749/https://www.sans.org/cyber-security-summit/archives/file/summit-archive-1492186586.pdf
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- https://www.cobaltstrike.com/blog/why-is-notepad-exe-connecting-to-the-internet
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author: EagleEye Team
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date: 2020-05-14
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modified: 2024-02-02
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tags:
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- attack.command-and-control
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- attack.execution
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- attack.defense-evasion
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- attack.t1055
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logsource:
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category: network_connection
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product: windows
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detection:
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selection:
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Image|endswith: '\notepad.exe'
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filter_optional_printing:
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DestinationPort: 9100
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condition: selection and not 1 of filter_optional_*
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falsepositives:
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- Printing documents via notepad might cause communication with the printer via port 9100 or similar.
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level: high
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