ryuk

General

Target

7a7e8077f4096cb5e45597ef6e8e7873a5f13db337383a312cb9e2da374599e4
Size

200KB
Sample

220220-f6kc1sabfp
MD5

f137ba372038184053d680941a2da136
SHA1

0ff2395df05c29dceeb23d6cce12798997b47b96
SHA256

7a7e8077f4096cb5e45597ef6e8e7873a5f13db337383a312cb9e2da374599e4
SHA512

9669b187a8aa8f88954765c1fc1c9ad343bbbbda0455e0e15bd86697c23d7e2a649732498b9bd3fc8a0cdb455f57224c40374155b83031a386daec2ad88f5ab7

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\Admin\AppData\Local\RyukReadMe.html

Family

ryuk

Ransom Note

[email protected] balance of shadow universe Ryuk

Emails

[email protected]

Targets

- Target
  
  7a7e8077f4096cb5e45597ef6e8e7873a5f13db337383a312cb9e2da374599e4
- Size
  
  200KB
- MD5
  
  f137ba372038184053d680941a2da136
- SHA1
  
  0ff2395df05c29dceeb23d6cce12798997b47b96
- SHA256
  
  7a7e8077f4096cb5e45597ef6e8e7873a5f13db337383a312cb9e2da374599e4
- SHA512
  
  9669b187a8aa8f88954765c1fc1c9ad343bbbbda0455e0e15bd86697c23d7e2a649732498b9bd3fc8a0cdb455f57224c40374155b83031a386daec2ad88f5ab7
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