New DNS ServerLevelPluginDll Installed

Severity: high
Author: Florian Roth (Nextron Systems)
Source: upstream

Detects the installation of a DNS plugin DLL via ServerLevelPluginDll parameter in registry, which can be used to execute code in context of the DNS server (restart required)

MITRE ATT&CK coverage

Tactic	Techniques
Persistence	`T1112` Modify Registry, `T1574.001` Hijack Execution Flow: DLL
Privilege Escalation	`T1574.001` Hijack Execution Flow: DLL
Defense Evasion	`T1112` Modify Registry, `T1574.001` Hijack Execution Flow: DLL

Event coverage

Provider	Event ID	Title
Sysmon	13	RegistryEvent (Value Set)

Stages and Predicates

Stage 1: `selection`

TargetObject|endswith: '\services\DNS\Parameters\ServerLevelPluginDll'

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.