-9608 Union All Select Null,null,'qbqvq'||'cpvnpztzsgrdpcuujmewgurdixdburiyttqtktxy'||'qqbqq',null,null,null,null,null,null-- Vbom Here

: This is the "fingerprint." The attacker concatenates specific random strings. If the web page then displays "qbqvqCPVNpZTzSGrDPCuUjMEwGUrDiXdBUrIytTqtktxYqqbqq" on the screen, the attacker knows the site is vulnerable to SQL injection.

: These are placeholders used to match the number of columns in the original database table. : This is the "fingerprint

The string you provided is a used to test for vulnerabilities in a database. : This is the "fingerprint

: This is a dummy value intended to make the original query return no results (by targeting a non-existent ID), allowing the results of the second query to take over the output. : This is the "fingerprint