Developers of Classic Ether Wallet said an attacker managed to hijack the domain for the wallet via social engineering late Thursday evening. A hacker called the domain s registry and impersonated the owner of the service in order to gain control of the site. The site was blocked by a phishing warning from Cloudflare briefly on Thursday and unreachable for most of Monday morning. Administrators are encouraging users to use a secure version of the wallet at a site hosted at Github or myetherwallet.com and its $ETC node.
Source: https://threatpost.com/classic-ether-wallet-compromised-via-social-engineering/126657/