Detectionlowtest

AWS STS GetSessionToken Misuse

Identifies the suspicious use of GetSessionToken. Tokens could be created and used by attackers to move laterally and escalate privileges.

Convert In Phoenix Studio

Open this Sigma rule in the converter with the YAML preloaded and ready for backend selection.

Launch

Austin SongerCreated Sat Jul 24Updated Sun Oct 09b45ab1d2-712f-4f01-a751-df3826969807cloud

Log Source

AWScloudtrail

ProductAWS← raw: aws

Servicecloudtrail← raw: cloudtrail

Detection Logic

detection:
    selection:
        eventSource: sts.amazonaws.com
        eventName: GetSessionToken
        userIdentity.type: IAMUser
    condition: selection

False Positives

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.

References

MITRE ATT&CK

Tactics

TA0008 · Lateral Movement TA0004 · Privilege Escalation TA0005 · Defense Evasion

Techniques

T1548 · Abuse Elevation Control Mechanism T1550 · Use Alternate Authentication Material

Sub-techniques

T1550.001 · Application Access Token