It seems you've provided a string that appears to be related to SQL injection attacks. The string "{KEYWORD}' UNION ALL SELECT NULL,NULL,NULL,NULL-- LarD" resembles a payload used in SQL injection attempts.
SQL injection is a type of web application security vulnerability that allows attackers to inject malicious SQL code into a web application's database in order to extract or modify sensitive data. One common technique used in SQL injection attacks is the UNION operator, which is used to combine the results of two or more SELECT statements into a single result set.
