ryuk

General

Target

84516cefc7fc9fb77046ae6ed0d1606eeedea4d99de335f6faa99c2f905a06c3
Size

193KB
Sample

220220-fq8exaaabm
MD5

21256f1e6fef12bb963fff955d5f4531
SHA1

45f2ba25a028bb4756e37b810b96a32bb359b339
SHA256

84516cefc7fc9fb77046ae6ed0d1606eeedea4d99de335f6faa99c2f905a06c3
SHA512

835b80e9d9db3aac6d670dde804c9caf999dd915086f1b3e037a60b572c6d6c1dc5261ee921851dbf50651be5e2eada75614be34c4e25b30e7dddd731fee1587

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:\RyukReadMe.html

Family

ryuk

Ransom Note

[email protected] balance of shadow universe Ryuk

Emails

[email protected]

Targets

- Target
  
  84516cefc7fc9fb77046ae6ed0d1606eeedea4d99de335f6faa99c2f905a06c3
- Size
  
  193KB
- MD5
  
  21256f1e6fef12bb963fff955d5f4531
- SHA1
  
  45f2ba25a028bb4756e37b810b96a32bb359b339
- SHA256
  
  84516cefc7fc9fb77046ae6ed0d1606eeedea4d99de335f6faa99c2f905a06c3
- SHA512
  
  835b80e9d9db3aac6d670dde804c9caf999dd915086f1b3e037a60b572c6d6c1dc5261ee921851dbf50651be5e2eada75614be34c4e25b30e7dddd731fee1587
Score

10^/10

ryuk discovery 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
- 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