As you know, Ransomware locks user's desktop and encrypt certain file on user's PC.
It induces victim to input code for unlocking desktop and to pay for getting unlocking code.
2. Spreading path and symptoms of infection
Ransomware can be spread via various ways including attachment of e-mail or link, even applications such as Adobe reader, Java, QuickTime Player and Adobe Flash Player.
Recently found malicious file is disguised its name as a movie-related file name.
As same as general ransomwares, it locks desktop and required to be inputted key.
Besides, it will appear after reboot.
3. How to prevent
Even though the damage case of ransomware hasn't been reported so far, to use PC safely from security threats of these ransomwares, we recommend following "Security management tips" for general users.
INCA Internet (Security Response Center / Emergency Response Team) provides diagnosis/treatment function with nProtect Anti-Virus/Spyware for detecting such as malicious file stated above and runs responding system against various security threats.