The hdkey-wallet npm package (version 2.1.0) includes malicious code that, upon module load, collects the entire process.env object along with hostname, username, home directory, platform, and current working directory. This data is JSON-encoded, base64-wrapped, and sent via HTTPS GET request to the Telegram Bot API using a hardcoded bot token and chat_id. The package attempts to require and re-export the legitimate hdkey library to maintain expected functionality and avoid suspicion. A temporary flag file prevents repeated data exfiltration. This behavior exposes sensitive environment variables commonly containing credentials such as AWS_*, NPM_TOKEN, and GITHUB_TOKEN to the attacker.

Sensitive environment variables and system information are exfiltrated to an attacker-controlled Telegram bot, potentially compromising credentials and secrets stored in the environment. This can lead to unauthorized access to cloud services, package repositories, and source code repositories. The malicious package masquerades as a legitimate dependency, increasing the risk of widespread compromise if used in development or production environments.

No official patch or remediation guidance is currently available. Users should immediately remove the hdkey-wallet package version 2.1.0 from their projects and replace it with the legitimate hdkey library. Review and rotate any credentials or tokens that may have been exposed through environment variables. Monitor for any unauthorized access resulting from credential compromise. Exercise caution when installing packages and verify the authenticity of dependencies.