Suspicious PowerShell Remote File Download Cmdlets (via ps_script)

ATT&CK techniques

Execution → C2

Recon
Resource Dev
Initial Access
Execution
- T1059.001PowerShell
Persistence
Priv Esc
Defense Evasion
Cred Access
Discovery
Lateral Movement
Collection
C2
- T1105Ingress Tool Transfer
Exfiltration
Impact

What it detects

This rule detects PowerShell script blocks that invoke remote download primitives such as Invoke-WebRequest, Start-BitsTransfer or the WebClient DownloadFile method. The BadPilot campaign uses these cmdlets to retrieve additional payloads, so their presence in script telemetry points to ingress tool transfer during intrusion.

Reporting behind it

Related detections9 linkedT1059.001 — drag to rearrange

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Suspicious PowerShell Reverse-HTTP Shellcode Download via CVE-2024-4577 Exploitation

Suspicious ClickFix PowerShell Download Cradle via TAG-150 Tradecraft

Malicious PowerShell Download of FortiEndpoint Patch Masquerade via EKZ Stealer

Malicious PowerShell StreamReader WebRequest Download Cradle

Suspicious PowerShell Download Cradle via Net.WebClient DownloadFile

Suspicious PowerShell Remote File Download Cmdlets (via ps_script)

Pivot detection · T1059.001 · 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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