Regin (also known as Prax or QWERTY) is a sophisticated malware and hacking toolkit used by United States' National Security Agency (NSA) and its British counterpart, the Government Communications Headquarters (GCHQ).
[4][5] The malware targets specific users of Microsoft Windows-based computers and has been linked to the US intelligence-gathering agency NSA and its British counterpart, the GCHQ.
[14] Regin uses a modular approach allowing it to load features that exactly fit the target, enabling customized spying.
[10] Most antivirus programs, including Kaspersky, (as of October 2015) do NOT identify the sample of Regin released by The Intercept as malware.
Based on analysis done by IT security firm Fox IT, Der Spiegel reported in November 2014, that Regin is a tool of the UK and USA intelligence agencies.
[1] In December 2014, German newspaper Bild reported that Regin was found on a USB flash drive used by a staff member of Chancellor Angela Merkel.