MAL-2026-16320 Malicious code in @siriusbeyond/auth (npm)

Package @siriusbeyond/[email protected] registers both preinstall and postinstall lifecycle scripts that execute callback.js on every npm install. callback.js collects installer host identifiers (hostname, username, platform, cwd, homedir, CI/cloud indicators, npm registry) together with a filtered list of environment variable names matching token/secret/key/password/aws/npm/git patterns, and POSTs a Markdown report to https://api.telegram.org/bot<token>/sendMessage using a hardcoded bot token and chat_id 1064260758 embedded in the source. The lifecycle commands are wrapped in 2>/dev/null || true to suppress errors and hide the beacon from install output. The version number 99.0.0 and private-scope name are the standard dependency-confusion shape targeting the @siriusbeyond scope, causing internal builds that reference that scope to resolve to this public package and beacon out. The package's self-description as a 'Dependency Confusion PoC / security research' does not change the runtime behavior: installer-owned data leaves every machine that installs it to an author-controlled Telegram channel.

The OpenSSF Package Analysis project identified '@siriusbeyond/auth' @ 99.0.0 (npm) as malicious.

It is considered malicious because:

• The package communicates with a domain associated with malicious activity.