DEV#POPPER compromised contract developers through realistic private GitHub coding assessments whose Tailwind configuration executed a disguised JavaScript loader when `npm run dev` was launched. The recovered implant used TRON and BNB Smart Chain transactions as a payload-resolution layer, deployed NetSupport Manager and stole browser credentials, wallet material, SSH keys and authenticated sessions through an App-Bound Encryption bypass. Investigators identified multiple command and exfiltration hosts holding about 1.28 TB of data and traced campaign-linked TRX conversions to an address holding nearly 25,000 USDT. Detection should prioritize the `.vs_cache` and SettingSync persistence paths, suspicious image imports in build configurations and the campaign-specific infrastructure rather than rapidly changing hashes.