Suspicious EKS Access Entry Creation via CloudTrail

ATT&CK techniques

Initial Access → Defense Evasion

Recon
Resource Dev
Initial Access
- T1078.004Cloud Accounts
Execution
Persistence
- T1078.004Cloud Accounts
- T1098Account Manipulation
Priv Esc
- T1078.004Cloud Accounts
- T1098Account Manipulation
Defense Evasion
- T1078.004Cloud Accounts
Cred Access
Discovery
Lateral Movement
Collection
C2
Exfiltration
Impact

What it detects

This rule detects CloudTrail CreateAccessEntry events on the EKS service. Wiz Research showed that creating an access entry for an attacker controlled IAM principal is a new persistence and privilege vector into a cluster, so access entry creation outside of change management should be investigated.

Reporting behind it

Related detections9 linkedT1078.004 — drag to rearrange

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Suspicious Device Code Authentication via Microsoft Authentication Broker

Suspicious Kerberos Constrained Delegation Configuration via msDS-AllowedToDelegateTo

Malicious Domain and Enterprise Admins Group Addition via net group Domain Add (via process_creation)

Malicious AWS Cross-Account AssumeRole With Suspicious Session Names via CloudTrail (via aws)

Suspicious EKS Access Entry Creation via CloudTrail

Pivot detection · T1078.004 · 9 related

Detection content is published as a reviewed draft. Tune thresholds and exclusions against your own telemetry before enabling this rule for alerting.

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