AWS Security Token Service (STS) AssumeRole Usage | Elastic Security Solution [8.5]

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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AWS Security Token Service (STS) AssumeRole Usageedit

Identifies the use of AssumeRole. AssumeRole returns a set of temporary security credentials that can be used to access AWS resources. An adversary could use those credentials 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:

https://docs.aws.amazon.com/STS/latest/APIReference/API_AssumeRole.html

Tags:

Elastic
Cloud
AWS
Continuous Monitoring
SecOps
Identity and Access

Version: 100 (version history)

Added (Elastic Stack release): 7.16.0

Last modified (Elastic Stack release): 8.5.0

Rule authors: Austin Songer

Rule license: Elastic License v2

Potential false positivesedit

Automated processes that use Terraform may lead to false positives.

Investigation guideedit

Rule queryedit

event.dataset:aws.cloudtrail and event.provider:sts.amazonaws.com and
event.action:AssumedRole and
aws.cloudtrail.user_identity.session_context.session_issuer.type:Role
and event.outcome:success

Threat mappingedit

Framework: MITRE ATT&CK^TM

Tactic:
- Name: Privilege Escalation
- ID: TA0004
- Reference URL: https://attack.mitre.org/tactics/TA0004/
Technique:
- Name: Abuse Elevation Control Mechanism
- ID: T1548
- Reference URL: https://attack.mitre.org/techniques/T1548/
Tactic:
- Name: Lateral Movement
- ID: TA0008
- Reference URL: https://attack.mitre.org/tactics/TA0008/
Technique:
- Name: Use Alternate Authentication Material
- ID: T1550
- Reference URL: https://attack.mitre.org/techniques/T1550/

Rule version historyedit

Version 100 (8.5.0 release)

Formatting only

Version 4 (8.4.0 release)

Updated query, changed from:

event.dataset:aws.cloudtrail and event.provider:sts.amazonaws.com and
event.action:AssumedRole and
aws.cloudtrail.user_identity.session_context.session_issuer.type:Role
and event.outcome:success

Version 2 (8.1.0 release)

Formatting only

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