(select (case When (8536=8536) Then 8536 Else 8536*(select 8536 - From Information_schema.character_sets) End))

The string "(SELECT (CASE WHEN (8536=8536) THEN 8536 ELSE 8536*(SELECT 8536 FROM INFORMATION_SCHEMA.CHARACTER_SETS) END))" is a fragment of malicious code used in SQL injection attacks, typically employed by automated scanners to test for database vulnerabilities. It is often found in comment sections as spambots attempt to probe website security.