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

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)

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. {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 : This part is designed to "close" the

The text you provided is a common string used in attacks, specifically a Time-Based attack targeting Microsoft SQL Server. What this code does {KEYWORD}) WAITFOR DELAY '0:0:5' AND (8141=8141