Overview

overview

10

Static

static

e5ceb42928...5c.exe

windows7_x64

10

e5ceb42928...5c.exe

windows10-2004_x64

10

Sharing

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General

  • Target
    e5ceb42928a16190aeb1a9893c89e808a756a30193ccd542f63c726da7d9fa5c
  • Size 214KB
  • Sample220220-bcferagafq
  • SHA256 e5ceb42928a16190aeb1a9893c89e808a756a30193ccd542f63c726da7d9fa5c
  • MD5 SHA1 SHA512
Score
10/10
ryukdiscoverypersistenceransomware

Malware Config

Extracted

Path

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

  • 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�������������������������������������������������������������������������������������������������������������������������������������������������������

Extracted

Path

  • C:\Documents and Settings\Admin\AppData\Local\Application Data\Application Data\Application Data\Application Data\Application Data\Application Data\Application Data\Application Data\Application Data\Temp\RyukReadMe.html

  • ryuk

Ransom Note

Targets

    • Target
      e5ceb42928a16190aeb1a9893c89e808a756a30193ccd542f63c726da7d9fa5c
    • Size 214KB
    • SHA256 e5ceb42928a16190aeb1a9893c89e808a756a30193ccd542f63c726da7d9fa5c
    • MD5 SHA1 SHA512
    Score
    10/10
    ryukdiscoverypersistenceransomware

    • Ryuk

      Ransomware distributed via existing botnets, often Trickbot or Emotet.

      ransomwareryuk

    • Suspicious use of NtCreateProcessExOtherParentProcess

    • Deletes shadow copies

      Ransomware often targets backup files to inhibit system recovery.

      ransomware

    • Executes dropped EXE

    • Modifies Installed Components in the registry

      persistence

    • 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
    behavioral1behavioral2

MITRE ATT&CK Enterprise v6

Tasks