This indicates an attempt to exploit a code execution vulnerability in Ultra Crypto Component.
The vulnerability is located in the "CryptoX.dll" ActiveX control with overlay long argument to the "SaveToFile" method. It may allow remote attackers to download and install arbitrary files in vulnerable systems.
Ultra Shareware Ultra Crypto Component 0
System Compromise: Remote attackers can gain control of vulnerable systems.
Set the kill bit for the following classid: