Zeus Sphinx banking trojan has seen a recent resurgence in the United States. The latest version harvests user credentials and other personal information from online banking sessions. Sphinx has been an on-and-off type of operation over the years, but it appears it is now on-again, with version updates and new infection campaigns that are back to targeting North American banks. The malware fingerprints infected devices in order to push updates to them over time, the researchers said. When infected by Sphinx, every device sends information home and is defined in the botnet by a bot ID.
Source: https://threatpost.com/sphinx-riddle-us-targets-modifications/155621/