ryuk

General

Target

0d25bbbeb68847cab4f3805bb8028ca901aa569abb038660c5febfe2ba24ec09.bin.sample.exe
Size

885KB
Sample

230309-wzyvtsbc7t
MD5

6a5bf25ff4f72ebca91280ffda057260
SHA1

722063331acdbfc93ccbfacbec045800a835dd9e
SHA256

0d25bbbeb68847cab4f3805bb8028ca901aa569abb038660c5febfe2ba24ec09
SHA512

64d6f8fe84882bb5b835388461e2f662d58b8b69ca6314869e4e4bd29496f4ae2d2bda5afa82cbfc6a29d563368343da1b19431fc24ec5261618a424543bce42
SSDEEP

12288:Qm+PiUwyM02Jl5YqWYgeWYg955/155/0QebUlAAsrsKCQoZRn6X:Q5iUtklagQKUKRrsKCQON6

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
  
  0d25bbbeb68847cab4f3805bb8028ca901aa569abb038660c5febfe2ba24ec09.bin.sample.exe
- Size
  
  885KB
- MD5
  
  6a5bf25ff4f72ebca91280ffda057260
- SHA1
  
  722063331acdbfc93ccbfacbec045800a835dd9e
- SHA256
  
  0d25bbbeb68847cab4f3805bb8028ca901aa569abb038660c5febfe2ba24ec09
- SHA512
  
  64d6f8fe84882bb5b835388461e2f662d58b8b69ca6314869e4e4bd29496f4ae2d2bda5afa82cbfc6a29d563368343da1b19431fc24ec5261618a424543bce42
- SSDEEP
  
  12288:Qm+PiUwyM02Jl5YqWYgeWYg955/155/0QebUlAAsrsKCQoZRn6X:Q5iUtklagQKUKRrsKCQON6
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