Suspicious Payload Download to Temp via curl from CDN

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 silently fetching a file into the /tmp directory from a CloudFront-hosted URL, the delivery pattern used by macOS Shlayer and Bundlore to stage their payloads. Abusing a reputable CDN and a world-writable directory lets the adware retrieve and run components while evading reputation-based controls.

Reporting behind it

Related detections9 linkedT1105 — drag to rearrange

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Suspicious Payload Download to Temp Directory by Simps Botnet (via process_creation)

Suspicious Remote Script Piped to Shell via Wget (via process_creation)

Suspicious File Download via CertUtil URLCache (via process_creation)

Suspicious PowerShell Download of Disguised Payload to ProgramData

Suspicious Payload Download to Temp via curl from CDN

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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