FinSpy is a surveillance software whose track record includes stealing information from international NGOs, governments and law enforcement organizations throughout the world.

Tips For Ejecting FinSpy, The Spy Who Monitors WhatsApp Cs
The functions of this malware include monitoring such as geolocation, all incoming and outgoing messages, contacts, media stored on the device, even from popular messaging services such as WhatsApp, Facebook Messenger, or Viber.
All extracted data is transferred to the attackers via SMS or HTTP protocol. The latest version of this malware can also monitor messaging applications that are considered safe such as Telegram, Signal, or Threema. In fact, FinSpy is also adept at covering its tracks. For example, iOS malware targeting iOS 11 and earlier, can now hide jailbreak signs.
Android version
While the Android version contains exploits that are able to obtain root privileges, including access to all files on unrooted devices.
To be able to infect Android and iOS devices, attackers need physical access to a smartphone or device that has been jailbroken/rooted before.
Follow This Step
1. Don’t leave your smartphone or tablet unlocked and always make sure no one can see the device pin code.
2. Don’t jailbreak or root the device because it makes attacking cybercriminals easier.
3. Be sure to always install the application from the official Google Play Store or App Store.
4. Don’t follow suspicious links sent to users.
5. In smartphone settings, block program installations from unknown sources.
6. Avoid disclosing smartphone passwords to anyone.
7. Never store unknown files or applications on the device, because it can damage privacy.
8. Use a security solution for smartphones.
For smartphones that have been jailbroken/rooted, there are three possible factors of infection, namely SMS messages, e-mail, or push notification.
Then, how to eject FinSpy, here is the complete method from Kaspersky Lab: