Suspicious AWS API Activity From WinSCP Client User-Agent

ATT&CK techniques

Initial Access → Exfiltration

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
Lateral Movement
Collection
C2
Exfiltration
- T1567Exfiltration Over Web Service
Impact

What it detects

This rule detects CloudTrail events whose user agent identifies the WinSCP transfer client which Wiz associates with cloud-fluent threat actors staging and exfiltrating data from S3 after obtaining credentials. This is important because WinSCP is an interactive file transfer tool that is unusual for automated cloud workloads and its presence signals hands-on-keyboard misuse of stolen access.

Reporting behind it

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Suspicious AWS API Activity From WinSCP 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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