AWS STS GetSessionToken Abuseedit
Identifies the suspicious use of GetSessionToken. Tokens could be created and used by attackers to move laterally and escalate privileges.
Rule type: query
Rule indices:
- filebeat-*
- logs-aws*
Severity: low
Risk score: 21
Runs every: 5 minutes
Searches indices from: now-6m (Date Math format, see also Additional look-back time)
Maximum alerts per execution: 100
References:
Tags:
- Elastic
- Cloud
- AWS
- Continuous Monitoring
- SecOps
- Identity and Access
Version: 3 (version history)
Added (Elastic Stack release): 7.16.0
Last modified (Elastic Stack release): 8.4.0
Rule authors: Austin Songer
Rule license: Elastic License v2
Potential false positivesedit
GetSessionToken may be done by a system or network administrator. Verify whether the user identity, user agent, and/or hostname should be making changes in your environment. GetSessionToken from unfamiliar users or hosts should be investigated. If known behavior is causing false positives, it can be exempted from the rule.
Investigation guideedit
Rule queryedit
event.dataset:aws.cloudtrail and event.provider:sts.amazonaws.com and event.action:GetSessionToken and aws.cloudtrail.user_identity.type:IAMUser and event.outcome:success
Threat mappingedit
Framework: MITRE ATT&CKTM
-
Tactic:
- Name: Privilege Escalation
- ID: TA0004
- Reference URL: https://attack.mitre.org/tactics/TA0004/
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Technique:
- Name: Abuse Elevation Control Mechanism
- ID: T1548
- Reference URL: https://attack.mitre.org/techniques/T1548/
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Tactic:
- Name: Lateral Movement
- ID: TA0008
- Reference URL: https://attack.mitre.org/tactics/TA0008/
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Technique:
- Name: Use Alternate Authentication Material
- ID: T1550
- Reference URL: https://attack.mitre.org/techniques/T1550/
Rule version historyedit
- Version 3 (8.4.0 release)
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-
Updated query, changed from:
event.dataset:aws.cloudtrail and event.provider:sts.amazonaws.com and event.action:GetSessionToken and aws.cloudtrail.user_identity.type:IAMUser and event.outcome:success
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