FTA: "[T]he Russian hackers have been able to capture credentials on a mass scale using botnets — networks of zombie computers that have been infected with a c

FTA: "[T]he Russian hackers have been able to capture credentials on a mass scale using botnets — networks of zombie computers that have been infected with a computer virus — to do their bidding. Any time an infected user visits a website, criminals command the botnet to test that website to see if it is vulnerable to a well-known hacking technique known as a SQL injection, in which a hacker enters commands that cause a database to produce its contents. If the website proves vulnerable, criminals flag the site and return later to extract the full contents of the database. “They audited the Internet,” Mr. Holden said."