Suspicious Curl POST Downloading PowerShell Payload to Temp Directory (via process_creation)

ATT&CK techniques

C2

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

What it detects

This rule detects curl issuing an HTTP POST request whose output is a PowerShell script, the ingress technique used in the Axios NPM supply chain attack where cmd.exe piped a curl POST response into a .ps1 file in the Temp directory. Adversaries stage second-stage scripts this way to pull payloads from attacker infrastructure, so the combination of curl, a POST verb, and a PowerShell target file is worth alerting on.

Reporting behind it

Related detections9 linkedT1105 — drag to rearrange

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Suspicious Curl POST Downloading PowerShell Payload to Temp Directory (via process_creation)

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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