Suspicious File Upload via curl Multipart Form
- Product
- windows
- Category
- process_creation
- Author
- HuntRule
- Published
- 2026-08-12
- Updated
- 2026-08-28
ATT&CK techniques
C2Recon
Resource Dev
Initial Access
Execution
Persistence
Priv Esc
Defense Evasion
Cred Access
Discovery
Lateral Movement
Collection
Exfiltration
Impact
What it detects
This rule detects curl.exe uploading a local file using a multipart form field. In the Notepad++ supply chain attack the operators used curl with a form file argument to exfiltrate collected reconnaissance output as reported by Kaspersky. Command line file upload via curl can indicate staged data exfiltration although some administrative scripts also use this pattern.
Reporting behind it
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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