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Detection rules › Sigma

DHCP Server Error Failed Loading the CallOut DLL

Severity
high
Author
Dimitrios Slamaris, @atc_project (fix)
Source
upstream

This rule detects a DHCP server error in which a specified Callout DLL (in registry) could not be loaded

MITRE ATT&CK coverage

TacticTechniques
PersistenceT1574.001 Hijack Execution Flow: DLL
Privilege EscalationT1574.001 Hijack Execution Flow: DLL
Defense EvasionT1574.001 Hijack Execution Flow: DLL

Event coverage

ProviderEvent IDTitle
DHCP-Server1031[EVENT_SERVER_CALLOUT_UNHANDLED_EXCEPTION] The installed server callout .dll file has caused an exception.
DHCP-Server1032[EVENT_SERVER_CALLOUT_LOAD_EXCEPTION] The installed server callout .dll file has caused an exception. The .dll file couldn't be loaded.
DHCP-Server1034[EVENT_SERVER_READ_ONLY_GROUP_ERROR] The DHCP service has failed to load one or more callout DLLs.

Stages and Predicates

Stage 1: selection

Provider_Name: Microsoft-Windows-DHCP-Server

Indicators

Each row is a field, operator, and value that the rule matches. The corpus column counts how many other rules in the catalog look for the same combination: high numbers point to widely-used, community-vetted indicators. Blank or 1 shows that the indicator is specific to this rule.

FieldKindValues
Provider_Nameeq
  • Microsoft-Windows-DHCP-Server corpus 2 (sigma 2)

Neighbors

Often fire together

Rules that target events appearing in the same incident timelines. They pattern-match on adjacent steps of the same TTP, so an alert from one is often paired with alerts from these. Useful for triage context and for assembling chained-detection rules.