ChatSend has been linked to spammy e-mail and wall posts from the accounts of Facebook users who download it. The ChatSend page now boasts some 134,000 likes, suggesting that the program has been making the rounds on the world s largest social network. ChatSend comes bundled, by default, with browser toolbars for Chrome, Firefox, and Internet Explorer that will set Web search as the default search engine, and set a predefined URL as the homepage.
Source: https://threatpost.com/shady-facebook-chat-app-messaging-without-notification-110111/75831/