DHCP Callout DLL Installation

calendar Oct 23, 2025 · attack.privilege-escalation attack.persistence attack.defense-evasion attack.t1574.001 attack.t1112  ·
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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)

Sigma rule (View on GitHub)

 1title: DHCP Callout DLL Installation
 2id: 9d3436ef-9476-4c43-acca-90ce06bdf33a
 3status: test
 4description: 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)
 5references:
 6    - https://blog.3or.de/mimilib-dhcp-server-callout-dll-injection.html
 7    - https://technet.microsoft.com/en-us/library/cc726884(v=ws.10).aspx
 8    - https://msdn.microsoft.com/de-de/library/windows/desktop/aa363389(v=vs.85).aspx
 9author: Dimitrios Slamaris
10date: 2017-05-15
11modified: 2023-08-17
12tags:
13    - attack.privilege-escalation
14    - attack.persistence
15    - attack.defense-evasion
16    - attack.t1574.001
17    - attack.t1112
18logsource:
19    category: registry_set
20    product: windows
21detection:
22    selection:
23        TargetObject|endswith:
24            - '\Services\DHCPServer\Parameters\CalloutDlls'
25            - '\Services\DHCPServer\Parameters\CalloutEnabled'
26    condition: selection
27falsepositives:
28    - Unknown
29level: high

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