ryuk

General

Target

f361afd4dd267d6f74f262033b700da652b4da1c0a21e14a8a468f6093d48e31
Size

201KB
Sample

220220-apbrnafgcq
MD5

3f5da05d62a70eb1212db39d5d6cf45e
SHA1

369b0ba084ba65268d56019653d8edd37c4838f1
SHA256

f361afd4dd267d6f74f262033b700da652b4da1c0a21e14a8a468f6093d48e31
SHA512

7424a9e8dc8dd521cbc98b910ab4642eb50f9d0c3a00e9b230207b505e3d7e74d16872d7be828983d6ec24c67858f1755cc1ac058fd48acefd8a730a41d790b1

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:\Documents and Settings\Admin\AppData\Local\Adobe\Color\Profiles\RyukReadMe.html

Family

ryuk

Ransom Note

[email protected] balance of shadow universe Ryuk

Emails

[email protected]

Targets

- Target
  
  f361afd4dd267d6f74f262033b700da652b4da1c0a21e14a8a468f6093d48e31
- Size
  
  201KB
- MD5
  
  3f5da05d62a70eb1212db39d5d6cf45e
- SHA1
  
  369b0ba084ba65268d56019653d8edd37c4838f1
- SHA256
  
  f361afd4dd267d6f74f262033b700da652b4da1c0a21e14a8a468f6093d48e31
- SHA512
  
  7424a9e8dc8dd521cbc98b910ab4642eb50f9d0c3a00e9b230207b505e3d7e74d16872d7be828983d6ec24c67858f1755cc1ac058fd48acefd8a730a41d790b1
Score

10^/10

ryuk discovery evasion persistence ransomware
- Ryuk
  Ransomware distributed via existing botnets, often Trickbot or Emotet.
  ransomware ryuk
- Deletes shadow copies
  Ransomware often targets backup files to inhibit system recovery.
  ransomware
- Modifies boot configuration data using bcdedit
  ransomware evasion
- Executes dropped EXE
- Checks computer location settings
  Looks up country code configured in the registry, likely geofence.
- Loads dropped DLL
- Modifies file permissions
  discovery
- Adds Run key to start application
  persistence
behavioral1 behavioral2