It is important to note that this is not a file trojan, but is an exploit by issuance of instruction on a system. As mentioned by Microsoft, "the vulnerability could cause a user's system to crash, if they attempted to access a file or folder whose path contained certain reserved words."
"DOS device names are reserved words, and cannot be used as folder or file names. When parsing a reference to a file or folder, Windows correctly checks for the case in which a single DOS device name is used in the path, and treats it as invalid. However, it does not check for the case in which the path includes multiple DOS device names. When Windows attempts to interpret the device name as a file resource, it performs an illegal resource access that usually results in a crash."