The US Federal Bureau of Investigation (FBI) has launched an investigation into the NSO group as it is suspected of being used to collect data on US citizens and businesses.
The NSO has been investigated in similar cases before, but now the FBI wants to know if the Israeli seller spyware, had played a role in cyber attacks that took place against residents and companies in the country.
In addition, the research wants to examine NSO's business activities and find out whether it was involved in attacks made at the government level.
NSO presents its tracking software as products "that help government agencies prevent and investigate terrorism and crime to save thousands of lives around the world". However, critics of the company argue that many governments around the world are exploiting these products to monitor other governments as well as the citizens of their own country.
The company's Pegasus suite, for example, is a malicious mobile software that can track communications on devices Android and iOS, export data, watch video and audio messages, and compromise messaging systems such as WhatsAppThe Twitter and Skype.
WhatsApp filed a lawsuit against NSO last October after discovering it had exploited one vulnerability in its application to attack hundreds of users in Bahrain, the United Arab Emirates and Mexico.
NSO software has been linked in the past to attacks on government demonstrators, civil rights activists, lawyers, activists and diplomats.
Citizen Lab researchers published a report that monitored the development of Pegasus software, claiming it has been used in cyberattacks in 45 countries in recent years.
Recently, the CEO of Amazon, Jeff Bezos, claimed that his smartphone was hacked through a malicious message sent during a chat with Prince Mohammed bin Salman in 2018. NSO software is involved suspect, but the company denied any involvement.