There is an issue with hackers infiltrating the website and replacing my script with their own.
They also add direct links to the file and modify and save it. I am unsure of how to resolve this problem.
To resolve the issue of hackers infiltrating the website and replacing your script, it is recommended to search for a backdoor script by examining the server access logs. You can wait for the script to be replaced again and check the time of file editing in the logs to determine where the access came from and what was recorded before.
but, finding a backdoor alone is not sufficient as you must identify the vulnerability through which it was placed on the site. It is also important to determine the engine version and provide an example of the implemented code.
Even major websites like Twitter and Facebook are vulnerable to hacking attacks, which can be difficult to resist. One solution is to use a reliable CMS or hire an experienced programmer. Alternatively, if finances are a concern, remove the option for users to register and create their own accounts on your site.
It is crucial to regularly check your computer for viruses as they can steal personal information such as usernames and passwords from various accounts. It's best to avoid storing passwords on your computer or browser and only download software from verified sources. Don't open attachments or click on links in emails from unknown senders.
To ensure website security, make backups of your site daily, regularly check for viruses, and study the functionality of your web hosting provider. If your site involves payments, it's best to use a secure https protocol or external payment services. Set your site developer the task of protecting the site from hacking, and consult other developers to ensure all vulnerabilities are addressed. Investing in site protection is less costly than dealing with a hacked site later on.
First thing you should check is file permissions on your server. If the files they are changing are world-writable (meaning anyone can read/write to them), you're practically handing them the keys. In Linux, file permissions are critical. The files should be owned by the user that's running the web server (usually www-data or apache) but not writable by anyone else. Set the right permission using `chmod` (e.g. `chmod 644` for files and `chmod 755` for directories). This will prevent unauthorized users from editing your files directly.
Another major point of entry could be outdated software. If you're running an outdated version of your CMS, like WordPress, or some older plugin or framework, you're vulnerable. Hackers often exploit known vulnerabilities in older versions of software, so it's critical to stay up to date. Make sure to regularly patch your CMS, plugins, and any third-party libraries you are using.
It also seems like they may be directly uploading malicious scripts to your server, which suggests that they might have found an unsecured form or upload feature on your site. You should review all forms and file upload functions to make sure you're validating the input properly and restricting what can be uploaded. Only allow specific file types, use mime-type checks, and never let uploaded files be executed from a directory that the server can execute scripts from.
I'd also recommend implementing a firewall or using a service like Cloudflare. These tools will add an extra layer of protection by filtering out suspicious traffic before it even hits your server. Cloudflare has features like Web Application Firewall (WAF) that can help protect your site against various attacks.
Finally, regularly monitor your server and run malware scans. There are tools like ClamAV or Maldet that can help you detect if any malicious scripts have been uploaded to your server. Set them to scan automatically, so you're alerted as soon as anything suspicious happens.
In summary:
1. Fix your file permissions.
2. Keep your software updated.
3. Secure any upload forms or other input areas.
4. Use a firewall or service like Cloudflare.
5. Set up regular malware scanning on your server.
It might be a good idea to do an audit of your site, going through your logs and checking for unusual activity to identify how the hackers are getting in.