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