Reference:
https://zenosloim.blogspot.com/2019/07/190704-whatsapp-installs-new-rootkit.html
Part 2 of the story continues here:
https://www.theguardian.com/technology/2019/oct/29/whatsapp-sues-israeli-firm-accusing-it-of-hacking-activists-phones
https://www.reuters.com/article/us-facebook-cyber-whatsapp-nsogroup/facebook-sues-israels-nso-group-over-alleged-whatsapp-hack-idUSKBN1X82BE
Kaspersky has done its job.
https://zenosloim.blogspot.com/2019/07/190704-whatsapp-installs-new-rootkit.html
Part 2 of the story continues here:
https://www.theguardian.com/technology/2019/oct/29/whatsapp-sues-israeli-firm-accusing-it-of-hacking-activists-phones
https://www.reuters.com/article/us-facebook-cyber-whatsapp-nsogroup/facebook-sues-israels-nso-group-over-alleged-whatsapp-hack-idUSKBN1X82BE
Kaspersky has done its job.