Malicious curl Insecure Download to AppData or Temp

ATT&CK techniques

Execution → C2

Recon
Resource Dev
Initial Access
Execution
- T1204.002Malicious File
Persistence
Priv Esc
Defense Evasion
Cred Access
Discovery
Lateral Movement
Collection
C2
- T1105Ingress Tool Transfer
Exfiltration
Impact

What it detects

This rule detects curl.exe writing a downloaded file into the AppData or Temp directory using the insecure flag, the ClickFix installation pattern used in OpenClaw brand-lure campaigns to fetch infostealer payloads before immediate execution. Attackers instruct victims to paste a terminal command that curls the payload to a user writable path. Downloading executables into AppData or Temp with certificate checks disabled is a strong staging indicator.

Reporting behind it

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Malicious Remote MSI Execution with Image Extension via msiexec (via process_creation)

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Malicious curl Insecure Download to AppData or Temp

Pivot detection · T1105 · 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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