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Curl Download Activity from npm Package Install

Detects curl downloading over HTTP(S) with a short argument list, writing output to a file or launched via a shell, when the process ancestry includes a Node.js npm package execution (`npx-cli.js` or an npx cache…

Description

Detects curl downloading over HTTP(S) with a short argument list, writing output to a file or launched via a shell, when the process ancestry includes a Node.js npm package execution (`npx-cli.js` or an npx cache path). Malicious npm packages and supply-chain compromises commonly fetch a second stage from install or postinstall scripts.

Detection logic

Its licence does not clear it for publishing here

Sunturai publishes a detection's own text where the licence it arrived under has been reviewed and permits it, and Elastic License 2.0 has not. The query as its source wrote it, its canonical form and the hash that pins this revision are in the workspace record.

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Detection requirements

Platform
ContainersESXiIaaSIdentity ProviderLinuxmacOSNetwork DevicesOffice SuiteSaaSWindows

The rule states no platform. This is derived from the 3 ATT&CK techniques it maps to.

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