SigmaHQ/rules/windows/malware/av_webshell.yml

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title: Antivirus Web Shell Detection
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id: fdf135a2-9241-4f96-a114-bb404948f736
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description: Detects a highly relevant Antivirus alert that reports a web shell
date: 2018/09/09
modified: 2019/10/04
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author: Florian Roth
references:
- https://www.nextron-systems.com/2018/09/08/antivirus-event-analysis-cheat-sheet-v1-4/
tags:
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- attack.persistence
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- attack.t1100
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- attack.t1505.003
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logsource:
product: antivirus
detection:
selection:
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Signature|startswith:
- "PHP/Backdoor"
- "JSP/Backdoor"
- "ASP/Backdoor"
- "Backdoor.PHP"
- "Backdoor.JSP"
- "Backdoor.ASP"
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- "*Webshell"
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condition: selection
fields:
- FileName
- User
falsepositives:
- Unlikely
level: critical