Suspicious s5cmd Execution for Cloud Storage Exfiltration

ATT&CK techniques

Exfiltration

Recon
Resource Dev
Initial Access
Execution
Persistence
Priv Esc
Defense Evasion
Cred Access
Discovery
Lateral Movement
Collection
C2
Exfiltration
- T1567.002Exfiltration to Cloud Storage
Impact

What it detects

This rule detects execution of s5cmd, a high-throughput S3 client, matching the data-exfiltration stage of the vibe-coded malware intrusion. Adversaries use s5cmd to rapidly upload staged files to attacker-controlled cloud storage. Presence of s5cmd on endpoints is rare in normal operations and suggests bulk exfiltration.

Reporting behind it

Related detections9 linkedT1567.002 — drag to rearrange

Suspicious Data Staging via Everything and 7-Zip Prior to Exfiltration via process_creation

Suspicious Rclone Cloud Exfiltration Execution

Malicious Data Exfiltration via S5cmd to S3

Malicious Data Exfiltration via Backblaze B2 CLI

Malicious Data Exfiltration via Restic Remote Backup

Malicious Data Exfiltration to MEGA via Rclone

Suspicious Rclone Data Exfiltration with Include Filter

Restic Backup Tool Exfiltration to Cloud Object Storage

Suspicious Rclone Data Exfiltration to Mega Cloud Storage (via process_creation)

Suspicious s5cmd Execution for Cloud Storage Exfiltration

Pivot detection · T1567.002 · 9 related

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