Chrysaor spyware is an Android surveillance malware that remained undetected for at least three years, NSO Group Technology is suspected to be the author. Experts believe the spyware has been installed on fewer than three-dozen Android devices. It was used in targeted attacks against journalists and activists, mostly located in Israel, other victims were in Georgia, Turkey, Mexico, the UAE and other countries. The threat was hard to analyse because it has the ability to delete itself when detect any suspicious activity related to its detection.”]
Source: https://securityaffairs.co/wordpress/57702/malware/android-chrysaor-spyware.html