The .part2 designation indicates this is the second segment of a multi-part archive. To extract the contents, you must have all other parts (e.g., part1.rar , part3.rar ) in the same folder.
I recommend uploading the file to VirusTotal to check for trojans or keyloggers before extraction. Diab2.part2.rar
any .exe or .bat files found inside without a security scan. Diab2.part2.rar