Emerging Threathighexperimental
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.
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Launch
Swachchhanda Shrawan Poudel (Nextron Systems)Created Wed Sep 24efd2eb09-b72e-4a61-8dc7-b1382a1e89832025
Emerging Threat
Active Threat
Developed to detect an active or emerging threat. Prioritize investigation of any alerts and correlate with threat intelligence.
Log Source
LinuxProcess Creation
ProductLinux← raw: linux
CategoryProcess Creation← raw: process_creation
Events generated when a new process is spawned on the system. Covers command-line arguments, parent/child relationships, and process metadata.
Detection Logic
Detection Logic1 selector
detection:
selection:
Image|endswith: '/curl'
CommandLine|contains|all:
- 'curl'
- '-d'
- 'webhook.site/bb8ca5f6-4175-45d2-b042-fc9ebb8170b7'
condition: selectionFalse Positives
Unlikely
False positives are unlikely for most environments. High confidence detection.
References
MITRE ATT&CK
Other
detection.emerging-threats
Rule Metadata
Rule ID
efd2eb09-b72e-4a61-8dc7-b1382a1e8983
Status
experimental
Level
high
Type
Emerging Threat
Created
Wed Sep 24
Path
rules-emerging-threats/2025/Malware/Shai-Hulud/proc_creation_lnx_mal_shai_hululd_exfiltration.yml
Raw Tags
attack.exfiltrationattack.t1041attack.collectionattack.t1005detection.emerging-threats