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Update: CryptoDefense rebranded to CryptoWall

After the fortune they reaped with CryptoDefense, not only did the crooks buy more computers from a botnet. They also rebranded it to 'CryptoWall' and made considerable changes to its website:

+ Multilanguage Support
+ Slight color changes in their website. Now it looks nicer, I confess.
+ Support (You can message them in case you need help) 

- Their English sucks, so I haven't noticed any improvement in this area.

* Ransomware notes are now named as:
  • DECRYPT_INSTRUCTION.txt
  • DECRYPT_INSTRUCTION.html
  • DECRYPT_INSTRUCTION.url
What does it mean to 'buy computers'?

Most computers that were hit by this nasty ransomware had been previosuly infected by a botnet. A botnet is a network of infected computers that can be spied and controlled by their masters (those who own the botnet network). 

These computer programs are usually used to gather users' credentials to home-banking and to perform DDoS attacks on websites, etc. (Yes, you can pay these crooks to bring down your competition's website).

One of their businesses consists of selling a certain number of infected computers so that the buyers can install whatever they want in them. In this case: CryptoDefense/CryptoWall. It's not a big issue for them to sell these computers because most of them are not used for homebanking anyway. So, they remain rather useless. Now, thanks to ransomware, they no longer have to wait until they get a bank account. They just encrypt their files and get paid via Bitcoins.

Is there a chance to get my files without payment?

Maybe, I can't tell. The reason why the first 'lucky' victims that were hit by the earliest version of CryptoDefense could recover their files was because its earliest version had a faulty implementation of CryptoAPI (needed to encrypt your files). 

If someone gets access to their hidden servers that provide the decryption tool and verifies the payments, all keys might be released.

Will they go to jail?

I very much hope so. CryptoLocker author has been identified and charges were pushed against him. CryptoLocker is way smarter than this Kiddo ransomware and the author still got caught. So, let's just be patient.

Is this information useful to you? Write me an email or consider a small donation. Any amount will be greatly appreciated!

If you have the virus samples, you can send them. (Place them inside a .zip / .rar file) and use 'infected' as password.



Comments

  1. i have a question:
    cryptowall :Keys pair stored on disk!???

    ReplyDelete
  2. These guys will fix your problem if you donate, what a coincidence! After I donated, they quickly gave me all I needed to get all my files back

    ReplyDelete

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CryptoDefense: Keys pair stored on disk!

This little detail slipped through their fingers... TOO LATE!

(I actually hid this post when I understood that it might alert the crooks. But SYMANTEC did!)

This is the exact path where your keys are:


Windows XP
C:\Documents and Settings\<USERNAME>\Application Data\Microsoft\Crypto\RSA\S-1-5-2... Windows 7
X:\Users\<USERNAME>\AppData\Roaming\Microsoft\Crypto\RSA\S-1-5-21... (X stands for your hard-disk letter, which is commonly C in most computers)

The private key is encrypted via DPAPI (Data Protection API). There are many RSA keys in that folder though, but you can still find them by sorting these files by date. If you don't remember the date you got infected, see your screenshot at the crook's webpage or search for the oldest HOW_DECRYPT.TXT file in your system.
I'll update this blog soon!


Software Utilities and Assistance

We have been requested many times to provide download links to all the tools we have used (and developed) to reverse the encryption schemes of some ransomware. These tools include Network Sniffers, TCP/IP Traffic Dumpers, Hex Editors, Debuggers and so on.
For those of you who like to get hands down to work, we'll gladly provide you with them. If you are not a computer geek and just need assistance, send us an E-mail and we'll try to fix your problem.
Bear in mind that we get many requests per day, so you must be patient!
Sincerely, the HD team.

You infected the wrong fool!

Yeah, I recovered all my files. ALL and EACH one of them without paying a PENNY. If that wasn't enough, we are also helping victims to recover their files without payment. 

Dear CryptoDefense Authors, if you are reading this: SCREW YOU. Your awful script kiddie skills led our team of true experts to THWART your evil plans, even though you used state-of-the-art RSA encryption. What a bunch of fools! that's like loosing a football match having Lionel Messi, Cristiano Ronaldo and Xavi on your team.

Next step is to report all your domain names (that you lamely use to infect more and more victims).

Now, if you are a victim, feel free to write us at howdecrypt@gmail.com