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It is not at all uncommon for password dumps to regularly appear on sites like pastebin.com. When they do, cyber thieves will immediately test them against popular sites like Gmail, Hotmail, Facebook, Twitter, Instagram, Paypay, etc., etc. Recently, Brian Krebs posted an article on his blog (krebsonsecurity.com) about a thousand-fold increase in fraudulent tax returns at the state level. Turbotax attributes this to cyber crooks using passwords that were exposed from one site and were reused by their legitimate owners across a multitude of other sites, including their Turbotax accounts.
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