Malicious Twitch Browser Extension Exposes 30,000 Users’ OAuth Tokens to Russian Bot Service
socket.dev
A Twitch browser extension on Chrome and Firefox forwards users’ live OAuth session tokens through proxies controlled by a Russian bot service.

Threat Research Team identified a cross-store browser extension, “Twitch Enhanced Viewer | JeetBot,” that forwards each user’s live Twitch OAuth session token to proxy servers operated by a Russian commercial bot service. The extension ships on both the Chrome Web Store (extension ID pnhhdhhcadcjfckjhpmjneldiegbojfb, 30,000 users) and Firefox Add-ons (twitchenhancedviewer@example.com, 552 users). Both listings are live at time of writing.