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Unsigned DLL loaded by DNS Service
editUnsigned DLL loaded by DNS Service
editIdentifies unusual DLLs loaded by the DNS Server process, potentially indicating the abuse of the ServerLevelPluginDll functionality. This can lead to privilege escalation and remote code execution with SYSTEM privileges.
Rule type: eql
Rule indices:
- logs-endpoint.events.library-*
- logs-windows.sysmon_operational-*
- winlogbeat-*
Severity: medium
Risk score: 47
Runs every: 5m
Searches indices from: now-9m (Date Math format, see also Additional look-back time
)
Maximum alerts per execution: 100
References:
Tags:
- Domain: Endpoint
- OS: Windows
- Use Case: Threat Detection
- Tactic: Privilege Escalation
- Data Source: Elastic Defend
- Data Source: Sysmon
Version: 3
Rule authors:
- Elastic
Rule license: Elastic License v2
Rule query
editany where host.os.type == "windows" and event.category : ("library", "process") and event.type : ("start", "change") and event.action : ("load", "Image loaded*") and process.executable : "?:\\windows\\system32\\dns.exe" and not ?dll.code_signature.trusted == true and not file.code_signature.status == "Valid"
Framework: MITRE ATT&CKTM
-
Tactic:
- Name: Privilege Escalation
- ID: TA0004
- Reference URL: https://attack.mitre.org/tactics/TA0004/
-
Technique:
- Name: Exploitation for Privilege Escalation
- ID: T1068
- Reference URL: https://attack.mitre.org/techniques/T1068/