If this file was unexpected, received via email, or downloaded from a dubious source, it is highly likely to be malicious (potentially a Trojan or spyware), especially given the name refers to a "tempter" or "adversary". To help you better, can you tell me:
were you expecting to be inside? (a game mod, a movie, something else?) iBLiS.rar
Occasionally used as a file name for shared, compressed archives containing media, such as movies (e.g., PSP-formatted films). If this file was unexpected, received via email,
did you download this file from? (a forum, a game site, an email attachment?) If this file was unexpected