1)>0waitfor/**/delay'0:0:2: Mega'and(select

: This is the core instruction for the database. It tells the server to pause for exactly 2 seconds before responding.

sql server - What is this hacker trying to do? - Stack Overflow MEGA'and(select 1)>0waitfor/**/delay'0:0:2

If you are seeing this in your web server logs, it means someone—or an automated scanner—is probing your site for security weaknesses. Developers typically prevent these attacks using or prepared statements , which ensure that user input is never executed as code. : This is the core instruction for the database

: This is a logical condition that is always true. In a blind injection attack, hackers use such conditions to determine if their injected code is being executed. - Stack Overflow If you are seeing this

If the website takes exactly 2 seconds (or more) to load, the attacker knows the database is vulnerable to SQL commands.

: This likely targets a field in a web application where the input "MEGA" is expected. The trailing single quote ( ' ) is intended to "break out" of the application's intended SQL query.

The string you provided is a specific type of cyberattack payload used to test for vulnerabilities. Specifically, it targets Microsoft SQL Server (MSSQL) databases. Breakdown of the Code