Kerberos Traffic from Unusual Process
Elastic Stack Serverless Security
Identifies network connections to the standard Kerberos port from an unusual process. On Windows, the only process that normally performs Kerberos traffic from a domain joined host is lsass.exe.
Rule type: eql
Rule indices:
- logs-endpoint.events.*
- winlogbeat-*
- logs-windows.*
Severity: medium
Risk score: 47
Runs every: 5m
Searches indices from: now-9m (https://www.elastic.co/guide/en/elasticsearch/reference/current/common-options.html#date-math[Date Math format], see also Additional look-back time)
Maximum alerts per execution: 100
References: None
Tags:
- Elastic
- Host
- Windows
- Threat Detection
- Credential Access
Version: 4
Rule authors:
- Elastic
Rule license: Elastic License v2
network where event.type == "start" and network.direction : ("outgoing", "egress") and
destination.port == 88 and source.port >= 49152 and
process.executable != "C:\\Windows\\System32\\lsass.exe" and destination.address !="127.0.0.1" and destination.address !="::1" and
/* insert False Positives here */
not process.name in ("swi_fc.exe", "fsIPcam.exe", "IPCamera.exe", "MicrosoftEdgeCP.exe", "MicrosoftEdge.exe", "iexplore.exe", "chrome.exe", "msedge.exe", "opera.exe", "firefox.exe")
Framework: MITRE ATT&CKTM
Tactic:
- Name: Credential Access
- ID: TA0006
- Reference URL: https://attack.mitre.org/tactics/TA0006/
Technique:
- Name: Steal or Forge Kerberos Tickets
- ID: T1558
- Reference URL: https://attack.mitre.org/techniques/T1558/