ryuk

General

Target

8c983fc99712412b33c356e0fbba3e58ca1ca0501537ea11c81cba0198442abe
Size

885KB
Sample

221110-g3yxnsfde9
MD5

a57e1e6fe1c98d2e75799a46e9eb5797
SHA1

7878e7042c355546c118a38b90d8f7221f74d8a4
SHA256

8c983fc99712412b33c356e0fbba3e58ca1ca0501537ea11c81cba0198442abe
SHA512

5764f3b1971f64c9d55f387524d92038350dbdf9a7195dc7e3f7b83760d93f45e73dd4c4af6cc597add838acd2d4a4e5b7a96a3444e3c8b0369b1d487621909d
SSDEEP

12288:zD7Z7cwy8U9JlpYqWYgeWYg955/155/0QebUlAAsDsKKAosRn6X:z57ctflKgQKUKRDsKKAjN6

Score

10^/10

Malware Config

Extracted

Path

C:\ProgramData\RyukReadMe.txt

Ransom Note

Your network has been penetrated. All files on each host in the network have been encrypted with a strong algorithm. Backups were either encrypted Shadow copies also removed, so F8 or any other methods may damage encrypted data but not recover. We exclusively have decryption software for your situation. More than a year ago, world experts recognized the impossibility of deciphering by any means except the original decoder. No decryption software is available in the public. Antiviruse companies, researchers, IT specialists, and no other persons cant help you decrypt the data. DO NOT RESET OR SHUTDOWN - files may be damaged. DO NOT DELETE readme files. To confirm our honest intentions.Send 2 different random files and you will get it decrypted. It can be from different computers on your network to be sure that one key decrypts everything. 2 files we unlock for free To get info (decrypt your files) contact us at [email protected] or [email protected] You will receive btc address for payment in the reply letter Ryuk No system is safe

Emails

[email protected]

Targets

- Target
  
  8c983fc99712412b33c356e0fbba3e58ca1ca0501537ea11c81cba0198442abe
- Size
  
  885KB
- MD5
  
  a57e1e6fe1c98d2e75799a46e9eb5797
- SHA1
  
  7878e7042c355546c118a38b90d8f7221f74d8a4
- SHA256
  
  8c983fc99712412b33c356e0fbba3e58ca1ca0501537ea11c81cba0198442abe
- SHA512
  
  5764f3b1971f64c9d55f387524d92038350dbdf9a7195dc7e3f7b83760d93f45e73dd4c4af6cc597add838acd2d4a4e5b7a96a3444e3c8b0369b1d487621909d
- SSDEEP
  
  12288:zD7Z7cwy8U9JlpYqWYgeWYg955/155/0QebUlAAsDsKKAosRn6X:z57ctflKgQKUKRDsKKAjN6
Score

10^/10

ryuk discovery evasion ransomware
- Ryuk
  Ransomware distributed via existing botnets, often Trickbot or Emotet.
  ransomware ryuk
- Clears Windows event logs
  evasion ransomware
- Deletes shadow copies
  Ransomware often targets backup files to inhibit system recovery.
  ransomware
- Modifies boot configuration data using bcdedit
  ransomware evasion
- Deletes backup catalog
  Uses wbadmin.exe to inhibit system recovery.
  ransomware
- Disables Task Manager via registry modification
  evasion
- Disables taskbar notifications via registry modification
  evasion
- Disables use of System Restore points
  evasion
- Checks computer location settings
  Looks up country code configured in the registry, likely geofence.
- Drops startup file
- Modifies file permissions
  discovery
- Enumerates connected drives
  Attempts to read the root path of hard drives other than the default C: drive.
behavioral1 behavioral2