Shai-Hulud NPM Package Malicious Exfiltration via Curl

Detects potential Shai Hulud NPM package attack attempting to exfiltrate data via curl to external webhook sites.

title: Shai-Hulud NPM Package Malicious Exfiltration via Curl
id: efd2eb09-b72e-4a61-8dc7-b1382a1e8983
status: experimental
description: Detects potential Shai Hulud NPM package attack attempting to exfiltrate data via curl to external webhook sites.
references:
    - https://www.getsafety.com/blog-posts/shai-hulud-npm-attack
author: Swachchhanda Shrawan Poudel (Nextron Systems)
date: 2025-09-24
tags:
    - attack.exfiltration
    - attack.t1041
    - attack.collection
    - attack.t1005
    - detection.emerging-threats
logsource:
    category: process_creation
    product: linux
detection:
    selection:
        Image|endswith: '/curl'
        CommandLine|contains|all:
            - 'curl'
            - '-d'
            - 'webhook.site/bb8ca5f6-4175-45d2-b042-fc9ebb8170b7'
    condition: selection
falsepositives:
    - Unlikely
level: high

• T1005Data from Local System
• T1041Exfiltration Over C2 Channel

• https://www.getsafety.com/blog-posts/shai-hulud-npm-attack↗