If your computer has been infected with CryptoDefense there may be a chance to restore your files. Fabian Wosar of discovered a method that allows you to decrypt your files if you were infected before April 1st 2014. Unfortunately, this only works for 50% of the infection cases but still provides a good chance of getting your files back. For instructions on how to do this, please read this section: If you need assistance with the above instructions, please ask in the. How to get help with CryptoDefense If you are infected the with CryptoDefense, or HOW_DECRYPT.txt, ransomware you can use this guide to learn more about the infection and what you can do once you are infected.
At this time, there is method to decrypt your files that works 50% of the time. For instructions on how to decrypt your files, please. I would like to thank Fabian Wosar, and Steven Wooton for there assistance with gathering information on this infection. There is an active CryptoDefense support topic, which contains discussion and the experiences of a variety of IT consultants, end users, and companies who have been affected by CryptoDefense.
This topic also contains information on how to attempt restoring files that were encrypted by CryptoDefense. If you are interested in this infection or wish to ask questions about it, please visit this. Once at the topic, and if you are a member, you can subscribe to it in order to get notifications when someone adds more information to the topic.
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What is CryptoDefense or the How_Decrypt Ransomware CryptoDefense is a ransomware program that was released around the end of February 2014 that targets all versions of Windows including Windows XP, Windows Vista, Windows 7, and Windows 8. When a computer is infected, the infection will perform the following actions: • Connects to the Command and Control server and uploads your private key. • Deletes all Shadow Volume Copies so that you cannot restore your files form the Shadow Volumes.
This means you will only be able to restore your files by restoring from backup or paying the ransom. Start Server.exe more. In some cases the infection does not properly clear the shadow copies, so you may want to use the instructions below to see if you can restore from them. • Scan your computer and encrypt data files such as text files, image files, video files, and office documents. • Create a screenshot of your active Windows screen and upload it their Command & Control server.
Neverwinter Nights Character Editor. This screen shot will be inserted in your payment page on their site, which is explained further in this FAQ. Ufs Tornado Flasher Software here. • Creates a How_Decrypt.txt and How_Decrypt.html file in every folder that a file was encrypted. The HTML and TXT files will contain instructions on how to access a payment site that can be used to send in the ransom.
• Creates a HKCU Software registry key and stores various configuration information in it. It will also list all the encrypted files under the HKCU Software PROTECTED key. • This payment site is located on the network and you can only make the payment in Bitcoins. Though this infection has numerous similarities to or, there is no evidence that they are related. In order to purchase the decryptor for your files you need to pay a $500 USD ransom in Bitcoins.
If you do not pay the ransom within 4 days it will double to $1,000 USD. They also state that if you do not purchase a decryptor within one month, they will delete your private key and you will no longer be able to decrypt your files. The files are encrypted using RSA-2048 encryption, which makes them impossible to decrypt via brute force methods. At the beginning of each encrypted file will be two strings of text.