Suspicious SeIncreaseBasePriorityPrivilege Use

Last updated 2 months ago on 2025-11-14

Created 3 months ago on 2025-09-25

About

Identifies attempts to use the SeIncreaseBasePriorityPrivilege privilege by an unusual process. This could be related to hijack execution flow of a process via threats priority manipulation.

Tags

Domain: EndpointOS: WindowsUse Case: Threat DetectionTactic: Privilege EscalationData Source: Windows Security Event LogsLanguage: kuery

Severity

high

Risk Score

MITRE ATT&CK™

Privilege Escalation (TA0004)(external, opens in a new tab or window)

↳ Access Token Manipulation (T1134)(external, opens in a new tab or window)

License

Elastic License v2(external, opens in a new tab or window)

Definition

Rule Type

Query (Kibana Query Language)

Integration Pack

Prebuilt Security Detection Rules

Index Patterns

logs-system.security*logs-windows.forwarded*winlogbeat-*

Related Integrations

system(external, opens in a new tab or window)

windows(external, opens in a new tab or window)

Query

✄𐘗text code block:
✄𐘗event.category:iam and host.os.type:"windows" and event.code:"4674" and
winlog.event_data.PrivilegeList:"SeIncreaseBasePriorityPrivilege" and event.outcome:"success" and
winlog.event_data.AccessMask:"512" and not winlog.event_data.SubjectUserSid:("S-1-5-18" or "S-1-5-19" or "S-1-5-20")

Install detection rules in Elastic Security

Detect Suspicious SeIncreaseBasePriorityPrivilege Use in the Elastic Security detection engine by installing this rule into your Elastic Stack.

To setup this rule, check out the installation guide for Prebuilt Security Detection Rules(external, opens in a new tab or window).