OpenSSF/OSV advisory MAL-2026-15920 confirms this npm version as malicious. box-sign-client@1.0.0 is a dependency-confusion vehicle positioned against the internal Box namespace (@box/sign-client). Its package.json declares a preinstall script (`node index.js`) that reads `os.hostname()` and `process.env.USER`/`USERNAME`, embeds those values into a subdomain of the hardcoded host `iv6mfybhp42k33ysmzi73de5w.canarytokens.com`, and calls `dns.resolve()` to trigger a DNS lookup against that...
Source
OpenSSF Malicious Packages via OSV
Summary
Malicious code in box-sign-client (npm)
Details
box-sign-client@1.0.0 is a dependency-confusion vehicle positioned against the internal Box namespace (@box/sign-client). Its package.json declares a preinstall script (`node index.js`) that reads `os.hostname()` and `process.env.USER`/`USERNAME`, embeds those values into a subdomain of the hardcoded host `iv6mfybhp42k33ysmzi73de5w.canarytokens.com`, and calls `dns.resolve()` to trigger a DNS lookup against that subdomain. On any `npm install` that resolves this public package instead of the intended internal one, the installing host's hostname and login user are transmitted via DNS to a third-party Canarytokens collector at install time, before any application code is run. The package advertises itself as a proof-of-concept for Box dependency confusion, but the beacon fires against any installer regardless of intent.
Decision reason
One or more suspicious static signals were detected.