Overview

overview

10

Static

static

bf575ce1c9...00.exe

windows7-x64

10

bf575ce1c9...00.exe

windows10-2004-x64

8

Sharing

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General

  • Target

    bf575ce1c9425bc44f5cabbc34366e0e92ef369db0a8b69942c5bdb1cca9b800.exe

  • Size

    138KB

  • Sample

    221220-mq4kaahc78

  • MD5

    f62bb82db62dd6b80908dcd79ea51fb2

  • SHA1

    e635ba1b935adf31ffd055d71884098567b3dd4f

  • SHA256

    bf575ce1c9425bc44f5cabbc34366e0e92ef369db0a8b69942c5bdb1cca9b800

  • SHA512

    869863239f231d3bea636a98f7adb8d6f04f60fb2cacc5ef8d8d87bfaf327abc57668e0cc1e8f10adcb7156646ff75ff67fb3f06f22b25797220eccd91b93e08

  • SSDEEP

    3072:dsFd0klDWOsja1mrT0CowNJ8s540uUf0WccH2hgcD:QWHrYNwNeQEBgc

Score
10/10
ryukdiscoveryevasionpersistenceransomware

Malware Config

Extracted

Path

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

Family

ryuk

Ransom Note
restpoonitool1975@protonmail.com balance of shadow universe Ryuk
Emails

restpoonitool1975@protonmail.com

Targets

    • Target

      bf575ce1c9425bc44f5cabbc34366e0e92ef369db0a8b69942c5bdb1cca9b800.exe

    • Size

      138KB

    • MD5

      f62bb82db62dd6b80908dcd79ea51fb2

    • SHA1

      e635ba1b935adf31ffd055d71884098567b3dd4f

    • SHA256

      bf575ce1c9425bc44f5cabbc34366e0e92ef369db0a8b69942c5bdb1cca9b800

    • SHA512

      869863239f231d3bea636a98f7adb8d6f04f60fb2cacc5ef8d8d87bfaf327abc57668e0cc1e8f10adcb7156646ff75ff67fb3f06f22b25797220eccd91b93e08

    • SSDEEP

      3072:dsFd0klDWOsja1mrT0CowNJ8s540uUf0WccH2hgcD:QWHrYNwNeQEBgc

    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 Matrix ATT&CK v6

Initial Access

Execution

Persistence

Registry Run Keys / Startup Folder

1
T1060

Privilege Escalation

Defense Evasion

File Deletion

2
T1107

File Permissions Modification

1
T1222

Modify Registry

1
T1112

Credential Access

Discovery

Query Registry

1
T1012

System Information Discovery

2
T1082

Lateral Movement

Collection

Exfiltration

Command and Control

Impact

Inhibit System Recovery

3
T1490

Tasks