Kirbi File Creation
editKirbi File Creation
editIdentifies the creation of .kirbi files. The creation of this kind of file is an indicator of an attacker running Kerberos ticket dump utilities, such as Mimikatz, and precedes attacks such as Pass-The-Ticket (PTT), which allows the attacker to impersonate users using Kerberos tickets.
Rule type: eql
Rule indices:
- logs-endpoint.events.file-*
- logs-windows.sysmon_operational-*
- logs-sentinel_one_cloud_funnel.*
- logs-m365_defender.event-*
- winlogbeat-*
- endgame-*
- logs-crowdstrike.fdr*
Severity: high
Risk score: 73
Runs every: 5m
Searches indices from: now-9m (Date Math format, see also Additional look-back time)
Maximum alerts per execution: 100
References: None
Tags:
- Domain: Endpoint
- OS: Windows
- Use Case: Threat Detection
- Tactic: Credential Access
- Data Source: Elastic Defend
- Data Source: Sysmon
- Data Source: SentinelOne
- Data Source: Microsoft Defender for Endpoint
- Data Source: Elastic Endgame
- Data Source: Crowdstrike
Version: 311
Rule authors:
- Elastic
Rule license: Elastic License v2
Rule query
editfile where host.os.type == "windows" and event.type == "creation" and file.extension : "kirbi"
Framework: MITRE ATT&CKTM
-
Tactic:
- Name: Credential Access
- ID: TA0006
- Reference URL: https://attack.mitre.org/tactics/TA0006/
-
Technique:
- Name: OS Credential Dumping
- ID: T1003
- Reference URL: https://attack.mitre.org/techniques/T1003/
-
Technique:
- Name: Steal or Forge Kerberos Tickets
- ID: T1558
- Reference URL: https://attack.mitre.org/techniques/T1558/