Overview

overview

10

Static

static

f361afd4dd...31.exe

windows7_x64

10

f361afd4dd...31.exe

windows10-2004_x64

8

Sharing

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General

  • Target

    f361afd4dd267d6f74f262033b700da652b4da1c0a21e14a8a468f6093d48e31

  • Size

    201KB

  • Sample

    220220-apbrnafgcq

  • MD5

    3f5da05d62a70eb1212db39d5d6cf45e

  • SHA1

    369b0ba084ba65268d56019653d8edd37c4838f1

  • SHA256

    f361afd4dd267d6f74f262033b700da652b4da1c0a21e14a8a468f6093d48e31

  • SHA512

    7424a9e8dc8dd521cbc98b910ab4642eb50f9d0c3a00e9b230207b505e3d7e74d16872d7be828983d6ec24c67858f1755cc1ac058fd48acefd8a730a41d790b1

Score
10/10
ryukdiscoveryevasionpersistenceransomware

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�������������������������������������������������������������������������������������������������������������������������������������������������������

Extracted

Path

C:\Documents and Settings\Admin\AppData\Local\Adobe\Color\Profiles\RyukReadMe.html

Family

ryuk

Ransom Note
[email protected] balance of shadow universe Ryuk

Targets

    • Target

      f361afd4dd267d6f74f262033b700da652b4da1c0a21e14a8a468f6093d48e31

    • Size

      201KB

    • MD5

      3f5da05d62a70eb1212db39d5d6cf45e

    • SHA1

      369b0ba084ba65268d56019653d8edd37c4838f1

    • SHA256

      f361afd4dd267d6f74f262033b700da652b4da1c0a21e14a8a468f6093d48e31

    • SHA512

      7424a9e8dc8dd521cbc98b910ab4642eb50f9d0c3a00e9b230207b505e3d7e74d16872d7be828983d6ec24c67858f1755cc1ac058fd48acefd8a730a41d790b1

    Score
    10/10
    ryukdiscoveryevasionpersistenceransomware

    • Ryuk

      Ransomware distributed via existing botnets, often Trickbot or Emotet.

      ransomwareryuk

    • Deletes shadow copies

      Ransomware often targets backup files to inhibit system recovery.

      ransomware

    • Modifies boot configuration data using bcdedit

      ransomwareevasion

    • 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
    behavioral1behavioral2

MITRE ATT&CK Enterprise v6

Tasks