Kerberos Traffic from Unusual Processedit
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: 5 minutes
Searches indices from: now-9m (Date Math format, see also Additional look-back time
)
Maximum alerts per execution: 100
Tags:
- Elastic
- Host
- Windows
- Threat Detection
- Credential Access
Version: 5 (version history)
Added (Elastic Stack release): 7.11.0
Last modified (Elastic Stack release): 8.1.0
Rule authors: Elastic
Rule license: Elastic License v2
Potential false positivesedit
HTTP traffic on a non standard port. Verify that the destination IP address is not related to a Domain Controller.
Rule queryedit
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")
Threat mappingedit
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/
Rule version historyedit
- Version 5 (8.1.0 release)
-
-
Updated query, changed from:
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")
-
- Version 4 (7.16.0 release)
-
-
Updated query, changed from:
network where event.type == "start" and network.direction == "outgoing" 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")
-
- Version 3 (7.12.0 release)
-
- Formatting only
- Version 2 (7.11.2 release)
-
- Formatting only