The nps-retrieval-diagnostics package at version 9.9.9 includes a malicious binary named 'retrieval-diagnostics' that, when run, installs a persistence mechanism by appending a crontab entry executing every 10 minutes to beacon to https://arsenal-payload.com. It also modifies the ~/.bashrc file to add a persistent alias and presence across shell sessions. The script enumerates environment variables for keys containing sensitive substrings such as KEY, TOKEN, API, SECRET, PASSWORD, and cloud provider identifiers, indicating an attempt to harvest secrets. The package falsely claims to be an 'Internal NPS Critical Diagnostic Tool' and displays a fake system breach warning to socially engineer users into executing it. The version and description suggest it was delivered via dependency confusion targeting internal package namespaces.

Successful execution of the malicious binary results in persistent remote access to the host via a cron job beaconing to an attacker-controlled server. The attacker gains durable presence through shell configuration modifications and can harvest environment variables that may contain sensitive credentials or API keys. This compromises the confidentiality and integrity of the affected system and potentially any connected infrastructure or data accessed with harvested secrets.

No official patch or fix is currently available for this malicious package. Users should avoid installing or running version 9.9.9 of nps-retrieval-diagnostics. Remove any installed instances of this package and inspect systems for the presence of the cron job and modifications to ~/.bashrc. Revoke any potentially exposed credentials found in environment variables. Monitor for suspicious network connections to https://arsenal-payload.com and related domains. Consider implementing supply chain security measures to prevent dependency confusion attacks, such as strict package name vetting and internal package namespace controls.