How To Find Unauthorized Web Shell?
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1. Search for suspicious files: Look for files with unusual names, such as php-backdoor.php or c99.php, which are commonly used by web shells.
2. Scan your web server logs: Search for requests that are suspicious, such as requests to non-existent pages, requests with large amounts of data, and requests with unusual headers.
3. Monitor your server’s resource usage: If the CPU or memory usage of your server is unusually high, it could be an indication of an unauthorized web shell.
4. Monitor your server’s network traffic: If there is an unexpected surge in network traffic, it could be an indication of an unauthorized web shell.
5. Use a web shell scanner: There are a number of web shell scanners available that can scan your server for known web shells.