Overview

overview

10

Static

static

fcd5ed5542...03.exe

windows7_x64

10

fcd5ed5542...03.exe

windows10-2004_x64

10

Sharing

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General

  • Target
    fcd5ed5542df043c9b5dcfa89aaa032e2fc965b076a138579ffb2da7bd1fe303
  • Size 120KB
  • Sample220219-31wv7affbl
  • SHA256 fcd5ed5542df043c9b5dcfa89aaa032e2fc965b076a138579ffb2da7bd1fe303
  • MD5 SHA1 SHA512
Score
10/10
ryukdiscoveryransomware

Malware Config

Extracted

Path

  • C:\users\Public\RyukReadMe.html

  • ryuk

Ransom Note
  • contact balance of shadow universe Ryuk $password = '2neBqEej6'; $torlink = 'http://rk2zzyh63g5avvii4irkhymha3irblchdfj7prk6zwy23f6kahidkpqd.onion'; function info(){alert("INSTRUCTION:\r\n1. Download tor browser.\r\n2. Open link through tor browser: " + $torlink + "\r\n3. Fill the form, your password: "+ $password +"\r\nWe will contact you shortly.\r\nAlways send files for test decryption.");};
URLs

  • http://rk2zzyh63g5avvii4irkhymha3irblchdfj7prk6zwy23f6kahidkpqd.onion

Targets

    • Target
      fcd5ed5542df043c9b5dcfa89aaa032e2fc965b076a138579ffb2da7bd1fe303
    • Size 120KB
    • SHA256 fcd5ed5542df043c9b5dcfa89aaa032e2fc965b076a138579ffb2da7bd1fe303
    • MD5 SHA1 SHA512
    Score
    10/10
    ryukdiscoveryransomware

    • Ryuk

      Ransomware distributed via existing botnets, often Trickbot or Emotet.

      ransomwareryuk

    • Executes dropped EXE

    • Checks computer location settings

      Looks up country code configured in the registry, likely geofence.

    • Loads dropped DLL

    • Modifies file permissions

      discovery

    • Enumerates connected drives

      Attempts to read the root path of hard drives other than the default C: drive.

    behavioral1behavioral2

MITRE ATT&CK Enterprise v6

Tasks