ryuk

General

Target

860e50.exe
Size

196KB
Sample

220128-mh85ssbgf7
MD5

484a2bcb1335ac97ee91194f4c0964bc
SHA1

ad11ed52ab33ad05eb9b1e9ade134ca1348acc81
SHA256

40b865d1c3ab1b8544bcf57c88edd30679870d40b27d62feb237a19f0c5f9cd1
SHA512

6e61612bd29425c5ab9b648fa83bc2d8616071247f8659aa316ab9d4adde0a9ceb9301737bb4216db223dfdd371106da75463f6d7e3a88e1c4cdd6c821f3935f

Score

10^/10

Malware Config

Extracted

Path

C:\Users\Admin\AppData\Local\Temp\RyukReadMe.html

Family

ryuk

Ransom Note

<html><body><p style="font-weight:bold;font-size:125%;top:0;left:0;"> [email protected] <br> </p><p style="position:absolute;bottom:0;right:1%;font-weight:bold;font-size:170%">balance of shadow universe</p><div style="font-size: 550%;font-weight:bold;width:50%;height:50%;overflow:auto;margin:auto;position:absolute;top:35%;left:40%;">Ryuk</div></body></html��

Emails

[email protected]

Extracted

Path

C:\Users\RyukReadMe.html

Family

ryuk

Ransom Note

[email protected] balance of shadow universe Ryuk

Emails

[email protected]

Targets

- Target
  
  860e50.exe
- Size
  
  196KB
- MD5
  
  484a2bcb1335ac97ee91194f4c0964bc
- SHA1
  
  ad11ed52ab33ad05eb9b1e9ade134ca1348acc81
- SHA256
  
  40b865d1c3ab1b8544bcf57c88edd30679870d40b27d62feb237a19f0c5f9cd1
- SHA512
  
  6e61612bd29425c5ab9b648fa83bc2d8616071247f8659aa316ab9d4adde0a9ceb9301737bb4216db223dfdd371106da75463f6d7e3a88e1c4cdd6c821f3935f
Score

10^/10

ryuk discovery persistence ransomware
- Ryuk
  Ransomware distributed via existing botnets, often Trickbot or Emotet.
  ransomware ryuk
- Suspicious use of NtCreateProcessExOtherParentProcess
- Deletes shadow copies
  Ransomware often targets backup files to inhibit system recovery.
  ransomware
- Executes dropped EXE
- Loads dropped DLL
- Modifies file permissions
  discovery
- Adds Run key to start application
  persistence
behavioral1 behavioral2