ctblocker | 749b990f8fe76d019574a8084e4bc6dccaef3c4370f14d1ff3097d82b6176913

General

Target

284b37c4771f4dcf91a37348014e04ff
Size

928KB
Sample

231221-3mq3sadeh8
MD5

284b37c4771f4dcf91a37348014e04ff
SHA1

211e5aa4cc0451aa252660576fc5c6a1961667fd
SHA256

749b990f8fe76d019574a8084e4bc6dccaef3c4370f14d1ff3097d82b6176913
SHA512

dddfd3b527d57ef5b2ac806ca7c083033d05b0df39b7b6513069c91eb43c8645ee2641e5203366a53de3abd7578f254d84ea2ebaebf33388d591d2db787fa568
SSDEEP

24576:+TSkT7/hjVX1uKLGLY27AX1Wh6qC/UxPpXWhi:Evl3LG0h1KZkwPhW

Score

10^/10

ctblocker ransomware

Malware Config

Extracted

Path

C:\ProgramData\pkbwrrm.html

Ransom Note

Your documents, photos, databases and other important files have been encrypted with strongest encryption and unique key, generated for this computer. Private decryption key is stored on a secret Internet server and nobody can decrypt your files until you pay and obtain the private key. If you see the main locker window, follow the instructions on the locker. Overwise, it's seems that you or your antivirus deleted the locker program. Now you have the last chance to decrypt your files. Open http://jssestaew3e7ao3q.onion.cab or http://jssestaew3e7ao3q.tor2web.org in your browser. They are public gates to the secret server. If you have problems with gates, use direct connection: 1. Download Tor Browser from http://torproject.org. 2. In the Tor Browser open the http://jssestaew3e7ao3q.onion Note that this server is available via Tor Browser only. Retry in 1 hour if site is not reachable. Copy and paste the following public key in the input form on server. Avoid missprints. Follow the instructions on the server. The list of your encrypted files: Path File

URLs

http://jssestaew3e7ao3q.onion.cab

http://jssestaew3e7ao3q.tor2web.org

http://jssestaew3e7ao3q.onion

Targets

- Target
  
  284b37c4771f4dcf91a37348014e04ff
- Size
  
  928KB
- MD5
  
  284b37c4771f4dcf91a37348014e04ff
- SHA1
  
  211e5aa4cc0451aa252660576fc5c6a1961667fd
- SHA256
  
  749b990f8fe76d019574a8084e4bc6dccaef3c4370f14d1ff3097d82b6176913
- SHA512
  
  dddfd3b527d57ef5b2ac806ca7c083033d05b0df39b7b6513069c91eb43c8645ee2641e5203366a53de3abd7578f254d84ea2ebaebf33388d591d2db787fa568
- SSDEEP
  
  24576:+TSkT7/hjVX1uKLGLY27AX1Wh6qC/UxPpXWhi:Evl3LG0h1KZkwPhW
Score

10^/10

ctblocker ransomware
- CTB-Locker
  Ransomware family which uses Tor to hide its C2 communications.
  ransomware ctblocker
- Deletes shadow copies
  Ransomware often targets backup files to inhibit system recovery.
  ransomware
- Checks computer location settings
  Looks up country code configured in the registry, likely geofence.
- Executes dropped EXE
- Loads dropped DLL
- Drops desktop.ini file(s)
- Enumerates connected drives
  Attempts to read the root path of hard drives other than the default C: drive.
- Drops file in System32 directory
- Sets desktop wallpaper using registry
  ransomware
- Suspicious use of SetThreadContext
behavioral1 behavioral2