The phishing methods are not new, but point to an effort to automate them at scale to target human rights activists, journalists and others.
The action follows similar steps taken this week by Twitter and Facebook, driven by research from FireEye.
A new confidential mode, expiration dates on messages, and two factor authentication is coming to your inbox.
Baratov is charged with building a for-profit hacking empire whose customers included Russian intelligence.
Google has rolled out new security features for users of Gmail and Drive, as well as its Chrome web browser. For Gmail and Drive users, Google is offering an opt-in feature called the Advanced Protection Program, aimed at those who are more prone to online threats because of the nature of their work. The company announced the program in a blog post on Tuesday.
Agencies like the FBI, Secret Service and NSA have limited visibility into programs that are not developed or somehow customized internally for use by White House staff.