Malicious Shai-Hulud npm Payload Execution via bun_environment Script (via process_creation)
- Category
- process_creation
- Author
- HuntRule
- Published
- 2026-05-12
- Updated
- 2026-08-28
ATT&CK techniques
Initial Access → ExecutionRecon
Resource Dev
Initial Access
Persistence
Priv Esc
Defense Evasion
Cred Access
Discovery
Lateral Movement
Collection
C2
Exfiltration
Impact
What it detects
This rule detects execution of the Shai-Hulud worm install-hook payloads setup_bun.js and bun_environment.js, dropped and run via npm pre/post-install scripts during the supply-chain compromise. These scripts scan for cloud and SSH credentials and self-propagate, so their execution signals active infection of the npm ecosystem.
Reporting behind it
- unit42.paloaltonetworks.comhttps://unit42.paloaltonetworks.com/npm-supply-chain-attack/
- attack.mitre.orghttps://attack.mitre.org/techniques/T1195/002/
- attack.mitre.orghttps://attack.mitre.org/techniques/T1059/007/
- wiz.iohttps://www.wiz.io/blog/shai-hulud-2-0-ongoing-supply-chain-attack
- attack.mitre.orghttps://attack.mitre.org/techniques/T1059/
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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