# ChainDrop: Inside a Self-Propagating npm Worm

DevFeed: [ChainDrop: Inside a Self-Propagating npm Worm](<https://devfeed.tech/articles/chaindrop-inside-a-self-propagating-npm-worm-7748.md>)

Original publisher: [Read original article](<https://unit42.paloaltonetworks.com/chaindrop-npm-worm-analysis/>)

Author: Unit 42

Published: 2026-08-06T22:26:39Z

Content type: article

Language: en

Sources: [Unit 42](<https://devfeed.tech/sources/unit-42.md>)

Topics: [ChainDrop](<https://devfeed.tech/topics/chaindrop.md>), [npm](<https://devfeed.tech/topics/npm.md>), [Malware](<https://devfeed.tech/topics/malware.md>), [C2](<https://devfeed.tech/topics/c2.md>), [Ethereum](<https://devfeed.tech/topics/ethereum.md>), [GitHub Actions](<https://devfeed.tech/topics/github-actions.md>), [GitHub](<https://devfeed.tech/topics/github.md>), [CI/CD](<https://devfeed.tech/topics/cicd.md>), [Security](<https://devfeed.tech/topics/security.md>)

Tags: [blockchain](<https://devfeed.tech/tags/blockchain.md>), [c2](<https://devfeed.tech/tags/c2.md>), [chaindrop](<https://devfeed.tech/tags/chaindrop.md>), [ci](<https://devfeed.tech/tags/ci.md>), [claude-code](<https://devfeed.tech/tags/claude-code.md>), [developer-tooling](<https://devfeed.tech/tags/developer-tooling.md>), [ethereum](<https://devfeed.tech/tags/ethereum.md>), [github](<https://devfeed.tech/tags/github.md>), [github-actions](<https://devfeed.tech/tags/github-actions.md>), [high-profile-threats](<https://devfeed.tech/tags/high-profile-threats.md>), [infrastructure](<https://devfeed.tech/tags/infrastructure.md>), [malware](<https://devfeed.tech/tags/malware.md>), [security](<https://devfeed.tech/tags/security.md>), [ssh](<https://devfeed.tech/tags/ssh.md>), [supply-chain](<https://devfeed.tech/tags/supply-chain.md>), [tokens](<https://devfeed.tech/tags/tokens.md>)

## AI overview

This article analyzes ChainDrop, a self-propagating npm worm that infected more than 400 packages and threatened developer workstations, CI pipelines, cloud environments and downstream users. It describes credential and token theft, GitHub Actions runner memory extraction, package republishing, persistence through developer and AI coding tools, blockchain-based C2 resolution, and C2 reconfiguration through an Ethereum transaction.

## Source excerpt

Analysis of ChainDrop, an npm supply chain worm extracting GitHub Actions runner secrets and using Ethereum smart contracts for C2 routing. The post ChainDrop: Inside a Self-Propagating npm Worm appeared first on Unit 42.