well what are the most powerfull spywares?

As of my last knowledge update in October 2021, various spyware tools and malware have gained notoriety for their capabilities in spying and data extraction. However, I cannot provide a current list of the most powerful spyware, as the cybersecurity landscape evolves rapidly. Instead, I can provide some historical examples of notable spyware:

**Pegasus**: Developed by the NSO Group, Pegasus is known for its ability to exploit vulnerabilities in mobile devices, allowing it to access messages, emails, photos, and even activate the microphone and camera without the user's knowledge.

**FinSpy (FinFisher)**: This surveillance software is often used by governments for monitoring purposes. It can capture audio, video, and keystrokes, being capable of infiltrating both computers and mobile devices.

**Hacking Team's Remote Control System (RCS)**: Hacking Team's spyware allows clients to conduct extensive surveillance. It can intercept communications, monitor web browsing, and gain remote control of devices.

**DarkComet**: This Remote Access Trojan (RAT) can capture keystrokes, take screenshots, and access webcams. It is known for being relatively easy to use and can be tailored for various spying activities.

**SpyBubble**: This smartphone spyware offers extensive monitoring features, including tracking calls, texts, GPS locations, and website visits. It's often marketed toward individuals looking to monitor their partners or children.

**mSpy**: Primarily marketed as parental control software, mSpy can monitor calls, texts, and app usage on mobile devices. Its features can be misused for unauthorized surveillance.

**Keyloggers**: While not a specific software, keyloggers are a common type of spyware that record keystrokes on a device, effectively capturing passwords and personal information.

It's important to note that the use of spyware raises significant ethical and legal issues, particularly regarding privacy rights and surveillance without consent. To stay informed about current threats, consult cybersecurity reports and trusted sources in cybersecurity news. Always ensure that your devices are secured with antivirus software and that updates are applied regularly to protect against known vulnerabilities.