TanStack Supply-Chain Attack Execution Indicators - Windows

Status: experimental
Severity: high
Log source: category process_creation, product windows
Author: Leonardo Gasparini
Source: github.com/SigmaHQ/sigma

Detects process execution indicators associated with the Mini Shai-Hulud supply-chain campaign targeting TanStack npm packages and others such as mistralai, uipath reported on early May 2026.

Known false positives

Unlikely

MITRE ATT&CK coverage

Tactic	Techniques
Execution	`T1059.007` Command and Scripting Interpreter: JavaScript `T1204.002` User Execution: Malicious File

Telemetry coverage

Provider	Record / event type
Sysmon	Event ID 1: Process creation
Security-Auditing	Event ID 4688: A new process has been created.

Rule body

title: TanStack Supply-Chain Attack Execution Indicators - Windows
id: 9b4f3d2e-6e8c-5fab-c7d9-2a3b4e5f6a7b
status: experimental
description: Detects process execution indicators associated with the Mini Shai-Hulud supply-chain campaign targeting TanStack npm packages and others such as mistralai, uipath reported on early May 2026.
references:
    - https://socket.dev/blog/tanstack-npm-packages-compromised-mini-shai-hulud-supply-chain-attack
    - https://socket.dev/supply-chain-attacks/mini-shai-hulud
    - https://safedep.io/mass-npm-supply-chain-attack-tanstack-mistral/
author: Leonardo Gasparini
date: 2026-05-12
tags:
    - attack.execution
    - attack.t1059.007
    - attack.t1204.002
    - detection.emerging-threats
logsource:
    category: process_creation
    product: windows
detection:
    selection:
        Image|endswith: '\bun.exe'
        CommandLine|contains|all:
            - 'run'
            - 'tanstack_runner.js'
    condition: selection
falsepositives:
    - Unlikely
level: high

Stages and Predicates

Stage 0: `condition`

selection

Stage 1: `selection`

selection:
    Image|endswith: '\bun.exe'
    CommandLine|contains|all:
        - 'run'
        - 'tanstack_runner.js'

Indicators

These rows show field, operator, and value matches.

Field	Kind	Values	Search
`CommandLine`	match	`run` corpus 4 (sigma 3, splunk 1) `tanstack_runner.js` corpus 2 (sigma 2)	`field:"CommandLine" kind:match`
`Image`	ends_with	`\bun.exe` corpus 2 (sigma 2)	`field:"Image" kind:ends_with value:"\bun.exe"`