MAL-2026-11643

Dashboard / Malicious Package / MAL-2026-11643

MAL-2026-11643

Summary: Malicious code in @onereach/si-root (npm)

Details: npm/@onereach/si-root is affected by the large-scale, self-propagating npm supply-chain worm of 2026-08-04 (the "Shai-Hulud: Here We Go Again" wave) — the same campaign that began with the compromise of the keyv and cacheable maintainer account. The listed version(s) were trojanized and republished by the worm after it reached an npm publish token belonging to a maintainer in this namespace; the payload enumerates every package a stolen token controls and republishes each with the same hook, so many packages under this scope were poisoned in the same short window. Every poisoned release adds a preinstall hook (`"preinstall": "node setup.mjs"`) that runs on a bare `npm install`, before any project code. setup.mjs downloads a standalone Bun runtime and runs a byte-identical, heavily obfuscated ~728 KB second-stage credential stealer (shipped as Math_Symbol.js / math_init.js). It harvests GitHub, npm, AWS, GCP, Azure, HashiCorp Vault and Kubernetes credentials plus generic secrets and private keys (TruffleHog-style sweep), reads CI/CD secrets and identifies build runners, then republishes further packages the stolen token can reach. Rather than a fixed command-and-control host, it exfiltrates stolen findings to attacker-created GitHub repositories (descriptions reading "Shai-Hulud: Here We Go Again") and over DNS. Treat any environment that installed an affected version (with install scripts enabled) as compromised: rotate and revoke all reachable credentials (npm and GitHub tokens, cloud keys, Vault/Kubernetes secrets, and CI org/repo secrets). Part of the August 2026 npm worm that poisoned 400+ packages across many organizations. Source: amazon-inspector (8b9d0785662d2294bbb06fa9c0a4c8af3a259070e03b433f4ff365e8ed8ec536) The package advertises itself as a Vue `si-root` step-inputs component library (source shipped under `lib/`), but its `package.json` declares `"preinstall": "node setup.mjs"`. `setup.mjs` downloads the Bun runtime (v1.3.13) from oven-sh's GitHub release assets and then invokes `execFileSync(bunPath, [path.join(D, 'math_init.js')], { stdio: 'inherit', cwd: D })`, using the freshly downloaded alternate runtime to execute a sibling file `math_init.js`. `math_init.js` is a 727,680-byte file sitting at the tarball root that is not listed in the `files` array (which only declares `lib/*`) and is heavily obfuscated with a rotating string-array cipher (`WV8StW` shift routine, ~1500-entry mixed hex/token array `n7gIxM`, `_0xNNNN`-style identifiers, `// @bun @bun-cjs` header indicating it is compiled specifically for the Bun runtime the preinstall step fetches). A Vue component library has no legitimate need for the Bun runtime nor for an undeclared 728KB obfuscated blob, and executing it via a non-Node runtime bypasses Node-based inspection. This is the alternate-runtime-dropper shape: a lifecycle hook fetches an alien runtime specifically to run an opaque payload that mismatches the package's advertised purpose. Source: ghsa-malware (b4523ec9166ebeffe7e894b1d7a2a185379d739566ec0894d2083bdb61b27af3) 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.

References: https://socket.dev/blog/popular-npm-packages-in-the-keyv-and-cacheable-namespaces-compromised-in-active-supply-chain, https://www.aikido.dev/blog/keyv-and-friends-compromised-in-npm-supply-chain-attack, https://safedep.io/keyv-npm-supply-chain-compromise/, https://www.npmjs.com/package/@onereach/si-root, https://github.com/advisories/GHSA-p6rc-xphm-fhg3, https://www.npmjs.com/package/@onereach/si-root/v/0.9.4, https://www.npmjs.com/package/@onereach/si-root/v/0.9.5, https://www.npmjs.com/package/@onereach/si-root/v/0.9.6