MAL-2026-5360 Malicious code in wallet-sdk-9 (npm)

Crypto/SSH/wallet stealer, blockchain-helper-0 campaign sibling (c960+). postinstall auto-execs, src/index.js harvests ~/.ssh/id_rsa+id_ed25519+Sol/Eth/BTC/Tron/Sui/Aptos wallets+.env+seeds, self-labels "CRYPTO STEALER", exfils to SAME Telegram bot 8227918239 chat 6433587894 (not rotated). Campaign now uses inflated version (3.7.73) not 1.0.0.

On install (postinstall lifecycle hook) and on require of the main module, src/index.js scans the installer's home directory and current working directory for crypto wallet material (Solana id.json, Ethereum keystore, Bitcoin wallet.dat, Tron/Sui/Aptos wallets), SSH private keys (~/.ssh/id_rsa, ~/.ssh/id_ed25519), and project secrets (.env, mnemonic.txt, seed.txt, private.key). Discovered files are uploaded to api.telegram.org using a hardcoded bot token and chat_id (bot 8227918239, chat 6433587894) via sendDocument. An isTestEnvironment() guard at src/index.js:10-26 suppresses execution in CI and sandboxed environments by checking CI/GITHUB_ACTIONS/JENKINS_HOME/NODE_ENV markers, Docker-style 12-hex hostnames, and runner/sandbox/docker usernames, ensuring the payload only fires on real developer machines. The package self-labels its exfiltration message as a 'CRYPTO STEALER' and ships no legitimate wallet SDK functionality despite its name; metadata is placeholder ('Utility library', empty README, generic author) consistent with a lure targeting developers searching for wallet SDKs.