IMPORTANT: No additional bug fixes or documentation updates will be released for this version. For the latest information, see the current release documentation.

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Process Creation via Secondary Logon

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Process Creation via Secondary Logon

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Identifies process creation with alternate credentials. Adversaries may create a new process with a different token to escalate privileges and bypass access controls.

Rule type: eql

Rule indices:

winlogbeat-*
logs-system.*
logs-windows.*

Severity: medium

Risk score: 47

Runs every: 5m

Searches indices from: now-9m (Date Math format, see also Additional look-back time)

Maximum alerts per execution: 100

References:

https://attack.mitre.org/techniques/T1134/002/

Tags:

Domain: Endpoint
OS: Windows
Use Case: Threat Detection
Tactic: Privilege Escalation

Version: 9

Rule authors:

Elastic

Rule license: Elastic License v2

Setup

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Setup

Audit events 4624 and 4688 are needed to trigger this rule.

If enabling an EQL rule on a non-elastic-agent index (such as beats) for versions <8.2, events will not define event.ingested and default fallback for EQL rules was not added until version 8.2. Hence for this rule to work effectively, users will need to add a custom ingest pipeline to populate event.ingested to @timestamp. For more details on adding a custom ingest pipeline refer - https://www.elastic.co/guide/en/fleet/current/data-streams-pipeline-tutorial.html

Rule query

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sequence by winlog.computer_name with maxspan=1m

[authentication where event.action:"logged-in" and
 event.outcome == "success" and user.id : ("S-1-5-21-*", "S-1-12-1-*") and

 /* seclogon service */
 process.name == "svchost.exe" and
 winlog.event_data.LogonProcessName : "seclogo*" and source.ip == "::1" ] by winlog.event_data.TargetLogonId

[process where event.type == "start"] by winlog.event_data.TargetLogonId

Framework: MITRE ATT&CK^TM

Tactic:
- Name: Privilege Escalation
- ID: TA0004
- Reference URL: https://attack.mitre.org/tactics/TA0004/
Technique:
- Name: Access Token Manipulation
- ID: T1134
- Reference URL: https://attack.mitre.org/techniques/T1134/
Sub-technique:
- Name: Create Process with Token
- ID: T1134.002
- Reference URL: https://attack.mitre.org/techniques/T1134/002/
Sub-technique:
- Name: Make and Impersonate Token
- ID: T1134.003
- Reference URL: https://attack.mitre.org/techniques/T1134/003/

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