Elastic Security Detection Rules

Kirbi File Creation

Last updated a month ago on 2026-04-24
Created 3 years ago on 2023-08-23

About

Identifies the creation of .kirbi files, a suspicious Kerberos ticket artifact often produced by ticket export or dumping tools such as Rubeus or Mimikatz. This can indicate preparation for Kerberos ticket theft or later abuse, including Pass-The-Ticket (PTT), and should be validated with writer process and follow-on activity.
Tags
Domain: EndpointOS: WindowsUse Case: Threat DetectionTactic: Credential AccessData Source: Elastic DefendData Source: SysmonData Source: SentinelOneData Source: Microsoft Defender XDRData Source: Elastic EndgameData Source: CrowdstrikeLanguage: eql
Severity
high
Risk Score
73
MITRE ATT&CK™

Credential Access (TA0006)(external, opens in a new tab or window)

↳ OS Credential Dumping (T1003)(external, opens in a new tab or window)

↳ Steal or Forge Kerberos Tickets (T1558)(external, opens in a new tab or window)

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

Definition

Rule Type
Event Correlation Rule
Integration Pack
Prebuilt Security Detection Rules
Index Patterns
logs-endpoint.events.file-*logs-windows.sysmon_operational-*logs-sentinel_one_cloud_funnel.*logs-m365_defender.event-*winlogbeat-*endgame-*logs-crowdstrike.fdr*
Related Integrations

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

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

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

m365_defender(external, opens in a new tab or window)

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

Query
text code block:
file where host.os.type == "windows" and event.type == "creation" and file.extension : "kirbi"

Install detection rules in Elastic Security

Detect Kirbi File Creation 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).