Cidra.D was discovered on 10th of March 2004. It's a trojan proxy, allowing to use users' computers to relay information, i.e. unsolicited email.
Based on the settings of your F-Secure security product, it will either automatically delete, quarantine or rename the detected program or file, or ask you for a desired action.
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See the manual for your F-Secure product on the Help Center.
Submit a file or URL for further analysis.
The trojan will add an entry to the Windows registry aiming at being run every time Windows starts. The key will be:
Which will point where the file is initially run from.
Cidra.D does not spread by itself. It was massively spammed.
It will relay connections though infected computers, giving its creator a massively distributed distribution channel for spam and other content.