Microsoft warned of an increasing number of web shell attacks by almost double compared to last year. NGO should educate staff not to browse untrusted website. Also NGO should update your web hosting software and review your web server file directory regularly, to make sure your website clean and safe.
For details, please refer to the below link:
https://www.microsoft.com/security/blog/2021/02/11/web-shell-attacks-continue-to-rise/