Recent leaked documents indicate that the NSA has installed malware on some 50.000 computer networks around the world.
The information comes from the Dutch media informationς NRC which lists the Snowden files. This document is in fact a management presentation slide, dating back to 2012 and showing a world map full of access points with "Exploitable Computer Networks" (Computer Network Exploitation - CNE).
CNEs are the secret penetration of systems information technologys that is achieved with the help of malware. And what happened to her Belgium telco Belgacom is an example, as previous leaks show.
Transparency shows that computer attacks originating from the NSA are made by the special section called TAO, its abbreviation Tailored Access Operations [Custom Access Features], formed by about 1.000 hackers.
This type of activity is particularly important for the NSA, as it is fairly easy to execute and relatively inexpensive. Considering that the intelligence service has the opportunity to obtain the information it would otherwise not have access to, it seems to be a good business for the NSA.
The NSA presentation shows businesses CNE around the world, including in Brazil, where there has been a huge scandal from previous reports showing that the Americans were spying on the country's president, both former and current, on local businesses and the oil company Petrobras, which authorities classify as financial espionage.
Other regional locations where the NSA managed to penetrate networks are located in cities such as Geneva, Athens, Rome, Caracas, Bogota, Mexico City, Havana, Bangkok, New Delhi, Sofia, Paris, Berlin, Frankfurt, Milan and many more that are distinguishable from the archive.
The NSA was asked for an answer on the information, but declined to comment, choosing to redirect the media to the US government, basically plays the game of responsibility.
Even if they decide to comment on the situation, you will probably use the predetermined answer to all this, which usually sums up in "we will do what we have to do because we can".