The vast majority of websites hosting cracks, patches, and serial generators are fronts for distributing malware. The "crack" file itself is frequently a Trojan horse, ransomware, or a cryptocurrency miner disguised as a licensing tool.
Regarding version 19.00.1088 specifically, users should be aware that using cracked versions of software can pose significant risks, including: Kaspersky Internet Security Version 19.00.1088 Crack