Suspicious AWS API Activity From S3 Browser Client User-Agent

ATT&CK techniques

Initial Access → Discovery

Recon
Resource Dev
Initial Access
- T1078.004Cloud Accounts
Execution
Persistence
- T1078.004Cloud Accounts
Priv Esc
- T1078.004Cloud Accounts
Defense Evasion
- T1078.004Cloud Accounts
Cred Access
Discovery
- T1526Cloud Service Discovery
Lateral Movement
Collection
C2
Exfiltration
Impact

What it detects

This rule detects CloudTrail events whose user agent identifies the S3 Browser desktop client which Wiz ties to cloud-fluent threat actors performing enumeration and object deletion after credential theft. This is important because production workloads rarely use the S3 Browser GUI so its appearance in CloudTrail is a reliable indicator that stolen keys are being operated from an attacker workstation.

Reporting behind it

Related detections9 linkedT1078.004 — drag to rearrange

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Suspicious AWS API Activity From S3 Browser Client User-Agent

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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