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HELP WITH ID OF RANSOM SCREEN FOR CTB-LOCKER WITH BLACK SCREEN


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#1 Paradox Unlimited

Paradox Unlimited

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Posted 28 July 2015 - 03:47 PM

IS THIS THE METHOD?????

 

@devs, as you might be aware the private key is used in the RSACryptoServiceProvider class .net and files are encrypted with AES-256 bit using the RijndaelManaged class.
 
This is the structure of the encrypted files:
 
- 32 bit integer, header length
- byte array, header (length is previous int)
*decrypt byte array using RSA & private key.
 
Decrypted byte array contains:
- 32 bit integer, IV length
- byte array, IV (length is in previous int)
- 32 bit integer, key length
- byte array, Key (length is in previous int)
 
- rest of the data is the actual file which can be decrypted using Rijndaelmanaged and the IV and Key
 

How do I know what the METHOD and CLASS of this virus is??

 

How do I find its IV ?????

Attached Files


Edited by hamluis, 31 July 2015 - 09:54 AM.
Moved from MRL to Gen Security - Hamluis.


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