Emerging Threatmediumexperimental
TanStack Supply-Chain Attack File Creation Indicators - Windows
Detects file creation indicators associated with the Mini Shai-Hulud supply-chain campaign targeting TanStack npm packages and others such as mistralai, uipath, etc reported on early May 2026.
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Launch
Emerging Threat
Active Threat
Developed to detect an active or emerging threat. Prioritize investigation of any alerts and correlate with threat intelligence.
Log Source
WindowsFile Event
ProductWindows← raw: windows
CategoryFile Event← raw: file_event
Events for file system activity including creation, modification, and deletion.
Detection Logic
Detection Logic2 selectors
detection:
selection_malware_files:
TargetFilename|endswith:
- '\router_init.js'
- '\tanstack_runner.js'
selection_persistence_claude_vscode:
TargetFilename|endswith:
- '\.claude\router_runtime.js'
- '\.vscode\router_runtime.js'
condition: 1 of selection_*False Positives
Unknown
False positive likelihood has not been assessed. Additional context may be needed during triage.
MITRE ATT&CK
Techniques
Other
detection.emerging-threats
Rule Metadata
Rule ID
8a3f2c1e-5d7b-4e9a-b6c8-1f2a3d4e5f6a
Status
experimental
Level
medium
Type
Emerging Threat
Created
Tue May 12
Author
Path
rules-emerging-threats/2026/Malware/TanStack-Supply-Chain/file_event_win_malware_tanstack_supply_chain.yml
Raw Tags
attack.initial-accessattack.t1195.002attack.executionattack.t1059.007attack.persistenceattack.t1554detection.emerging-threats