MAL-2026-6693 Malicious code in thirdwb (npm)

Malicious npm package published as part of a coordinated DeFi-themed infostealer campaign. thirdwb is a typosquat of the legitimate thirdweb package. It uses a side-loader technique, pulling in log-taker as a transitive dependency; the infostealer runs automatically via that dependency's postinstall hook. The payload harvests cryptocurrency wallet vaults (MetaMask, Phantom, Solflare, OKX, Coinbase, TrustWallet, Backpack, TronLink), browser cookies and credentials, SSH keys, AWS credentials, .npmrc tokens, Docker config, shell history, and password manager databases, exfiltrating all data to the C2 domain log-taker.store.

The package was found to contain malicious code or consuming dependency that contains malicious code

Any computer that has this package installed or running should be considered fully compromised. All secrets and keys stored on that computer should be rotated immediately from a different computer. The package should be removed, but as full control of the computer may have been given to an outside entity, there is no guarantee that removing the package will remove all malicious software resulting from installing it.