ryuk

General

Target

4b058c6cdfa223c3178bc56e3db00a5b6db92c405fdc8ccb9008b83aa5309cd1
Size

112KB
Sample

220220-jhfxgaabe6
MD5

253ca028e0e6c66a5933af768ff0516a
SHA1

c8122f753fdaee7139f3fad1ed3c564fb52fd210
SHA256

4b058c6cdfa223c3178bc56e3db00a5b6db92c405fdc8ccb9008b83aa5309cd1
SHA512

0b92be9dd25d83c1a324b0cc0e54800333c7f71635be15ba777985c40a17fadace1fdeb1c49eec457c946c46753a87a27f6a8a1ae4113bee644a3e7b9d0908e0

Score

10^/10

Malware Config

Extracted

Path

C:\users\Public\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:\$Recycle.Bin\RyukReadMe.html

Family

ryuk

Ransom Note

[email protected] balance of shadow universe Ryuk

Emails

[email protected]

Targets

- Target
  
  4b058c6cdfa223c3178bc56e3db00a5b6db92c405fdc8ccb9008b83aa5309cd1
- Size
  
  112KB
- MD5
  
  253ca028e0e6c66a5933af768ff0516a
- SHA1
  
  c8122f753fdaee7139f3fad1ed3c564fb52fd210
- SHA256
  
  4b058c6cdfa223c3178bc56e3db00a5b6db92c405fdc8ccb9008b83aa5309cd1
- SHA512
  
  0b92be9dd25d83c1a324b0cc0e54800333c7f71635be15ba777985c40a17fadace1fdeb1c49eec457c946c46753a87a27f6a8a1ae4113bee644a3e7b9d0908e0
Score

10^/10

ryuk discovery 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
behavioral1 behavioral2