Suspicious Restic Cloud Backup Exfiltration via Renamed winupdate Binary via process_creation

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 the restic backup tool being run, including copies renamed to winupdate.exe, with arguments targeting a Wasabi or S3 object store. The threat actor renamed restic to a Windows-update-like name and used it to back up and exfiltrate victim data to attacker-controlled cloud storage, so this pattern indicates staged bulk exfiltration disguised as backup activity.

Reporting behind it

Related detections9 linkedT1567.002 — drag to rearrange

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Suspicious Data Exfiltration to Telegram Bot API sendDocument (via proxy)

Suspicious Data Exfiltration to Anonymous File Sharing Services (via dns_query)

Suspicious Restic Cloud Backup Exfiltration via Renamed winupdate Binary via process_creation

Pivot detection · T1567.002 · 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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