SigmaHQ/rules/windows/sysmon/sysmon_dhcp_calloutdll.yml

title: DHCP Callout DLL installation
status: experimental
description: Detects the installation of a Callout DLL via CalloutDlls and CalloutEnabled parameter in Registry, which can be used to execute code in context of the DHCP server (restart required)
reference: 
    - https://blog.3or.de/mimilib-dhcp-server-callout-dll-injection.html
    - https://technet.microsoft.com/en-us/library/cc726884(v=ws.10).aspx
    - https://msdn.microsoft.com/de-de/library/windows/desktop/aa363389(v=vs.85).aspx
date: 2017/05/15
author: Dimitrios Slamaris
logsource:
    product: windows
    service: sysmon
detection:
    selection:
        EventID: 13
        TargetObject: 
            - '*\Services\DHCPServer\Parameters\CalloutDlls'
            - '*\Services\DHCPServer\Parameters\CalloutEnabled'
    condition: selection
falsepositives:
    - unknown
level: high