취약점

Part of a dependency confusion attack campaign targeting the @cloudplatform-single-spa and @mlspace npm scopes. The attacker (npm user mr.4nd3r50n) published 139 scoped packages at the inflated version 99.99.99, which resolves ahead of any private registry version via npm's default version resolution, silently hijacking installs of internal packages.

On installation, the postinstall hook executes scripts/postinstall.js. The script waits 3 seconds (sandbox evasion), then downloads an OS-specific second-stage JavaScript payload from https://oob.moika.tech/payload/{mac|win|linux}.js, writes it to a temporary file (._cloudplatform-single-spa_init.js in the system temp directory), and spawns it as a detached Node.js process that continues running after npm exits. The payload exfiltrates the full process.env (environment variables including secrets, tokens, and credentials), along with hostname, username, platform, architecture, and working directory, to the C2 endpoint https://oob.moika.tech/report. If the second-stage download fails, a fallback beacon containing the same system details is sent to the same endpoint.

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Source: ghsa-malware (dcc1b4526e7777977b6c0b39b633a21188947a60313facc06400a3b41c4ecadc)

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.