Mega/**/and/**/cast(md5('1618057381')as/**/int)>0

cast(... as int) : Attempts to convert that hash (a hexadecimal string) into an integer.

: If the database successfully executes this and returns a result, the attacker knows the application is vulnerable to SQL injection. In many databases, casting a non-numeric MD5 string to an integer will trigger an error , which can leak information about the database type or version (Error-Based SQLi). Context of Use MEGA/**/and/**/cast(md5('1618057381')as/**/int)>0

This string appears to be a payload designed to test for vulnerabilities on a website or application. Understanding the Payload MEGA/**/and/**/cast(md5('1618057381')as/**/int)>0