New Fake "CryptoLocker" circulating on the Internet 

A few days ago, in the institution where my wife works they catch it with CryptoLocker-like virus that in all external signs resembles normal CryptoLocker virus. I asked her to send me several "encrypted" files together with their unencrypted copies to analyze them and the first thing I noticed was the difference in their size. The "encrypted" files are smaller than the originals - something that will not happen when encoding with RSA, especially "2048-RSA" as in the message for ransom claimed. This "CryptoLocker" simply use some sort of data compression like in RAR format. 

Does anyone have more information about this virus?