Generic alphanumeric file names (like CCIH2 ) are often used by malicious sites to deliver "bundled" installers or trojans. If you downloaded this from a pop-up or a "free download" button on a suspicious site, do not open it.
Where did you find it? If it was from a link shortener like ya.cc/CciH2 (which is currently used for Russian e-commerce promos), it may just be a mislabeled or automated download. CCIH2.rar
Upload the file to VirusTotal . It will check the file against over 70 different antivirus engines and tell you if it's a known threat. Generic alphanumeric file names (like CCIH2 ) are
Many files with names like this are part of "survey scams" where you are asked to complete an offer or download a "password cracker" to see the contents, which usually leads to further malware. If it was from a link shortener like ya