Website Malware Attack - Help Needed

I am in need of assistance as one of my sites has recently been attacked by malware and now rendered the other sites on the same hosting package offline. Security Measures: I have not taken any steps to secure my website after the attack, so the ideal candidate should be able to implement necessary security measures to prevent future attacks. The below has come from my hosting company. ********************************************************************************* (A) Disinfecting or deleting the malicious files 1. Open the indicated link in your browser and use the access data for your primary SFTP user for authentication. Alternatively, you may also use an FTP client (such as FileZilla) to open the file in the ./logs/forensic/ directory. 2. The log file will contain additional information about the malicious files. Please follow the instructions indicated there. 3. To make your website accessible again, change the permissions from 200 to 604 after cleaning up the files. For directories, change the permissions from 700 to 705. Your website will only be able to be displayed properly after these changes have been made. ********************************************************************************* If you possess the necessary skills and experience to help me with this project, please reach out to discuss further details.