How to prevent attacks by QSnatch
QSnatch malware is targeting QNAP NAS with previous firmware/application versions, all vulnerabilities had since been fixed on current versions. QNAP had also updated Malware Remover application on November 1, 2019 to detect and remove any remaining malware on the NAS. Kindly refer to our updated security advisory for more detail.
How to prevent attacks by QSnatch
1. Update to latest firmware https://www.qnap.com/en/download
2. Install Malware Remover (already included 4.4.3) from App Center
If you receive warning messages from ISP, or unable to update firmware or download apps from the App Center.Please try manually installing Malware remover by the procedures below.
Procedures:
1.Malware remover can be downloaded on the following page or if you are unsure about the QNAP NAS model, please click here.
2.Unzip the downloaded zip file.
3.Login the QTS web interface and find the App Center.
4.click 
to manually install Malware Remover.
If you have any problems with downloading or installing Malware remover, please contact us.
Reference link:
How to install QNAP applications (.qpkg files) manually?
https://www.qnap.com/en/how-to/knowledge-base/article/how-to-install-qnap-applications-qpkg-files-manually/
