{keyword}) Waitfor Delay '0:0:5' And (8141=8141 -

: This part is designed to "close" the original legitimate query (for example, closing a parenthesis) so the malicious command can run. Why attackers use it

Detailed documentation on identifying and preventing these vulnerabilities can be found through the OWASP Foundation or PortSwigger's Web Security Academy. Blind SQL Injection Detection and Exploitation (Cheatsheet) {KEYWORD}) WAITFOR DELAY '0:0:5' AND (8141=8141

Attackers use this to test if a website is vulnerable to SQL injection when the database doesn't return visible error messages. If the website takes exactly five seconds longer to load after this "keyword" is entered, the attacker knows they have successfully executed code on the server. : This part is designed to "close" the

: This is a Microsoft SQL Server command that instructs the database to pause for exactly five seconds before executing the rest of the query or returning a result. If the website takes exactly five seconds longer

: This is a "tautology"—a statement that is always true. It is used by attackers to ensure the logic of the injected code doesn't break the original query.

The text you provided is a common string used in attacks, specifically a Time-Based attack targeting Microsoft SQL Server. What this code does