Based on available technical and cultural records, there is no official "deep report" or widely documented entity specifically known as
Any unknown .exe file can be exploited by cybercriminals to deliver malware.
"Deniz" is a common Turkish name. A "deniz.exe" would fit the pattern of a localized or character-specific horror project similar to DERE EXE or other indie titles found on platforms like Itch.io and Steam .
If you have encountered this file, it is recommended to check its hash on a security site like VirusTotal or use a dedicated antivirus scanner to determine if it is a false positive or a genuine threat.