Ryuk | Tehdit Seviyesi: critical | Tür: Ransomware

Kriptografik Tanımlayıcılar

SHA256d6b7b27e13700aaa7f108bf9e76473717a7a1665198e9aafcc2d2227ca11bba9
MD52cc630e080bb8de5faf9f5ae87f43f8b
Dosya Türüexe
Boyut131.0 KB
İlk Görülme2023-11-20
Dosya Adıd6b7b27e13700aaa7f108bf9e76473717a7a1665198e9aafcc2d2227ca11bba9.exe
Etiketlerexe, Ransomware, Ryuk

Malware Ailesi: Ryuk

Ryuk, Wizard Spider ile ilişkilidir.

TürRansomware
Programlama DiliC
Hedef PlatformWindows
C2 Protokolü
AmaçHastane hedefli ransomware
İlk Görülen Yıl2018

Tehdit Göstergeleri (IOC)

  • SHA256: d6b7b27e13700aaa7f108bf9e76473717a7a1665198e9aafcc2d2227ca11bba9
  • MD5: 2cc630e080bb8de5faf9f5ae87f43f8b

Sistem Temizleme Rehberi

  1. Sistemi ağdan DERHAL ayırın — diğer cihazlara yayılmayı durdurun
  2. Fidye ödemeyin — dosyaları geri alma garantisi yoktur
  3. Etkilenen sürücüleri karantinaya alın
  4. Kullanılan fidye yazılımı ailesini belirleyin (nomoreransom.org)
  5. Mevcut decryptor tool'ları deneyin (NoMoreRansom projesi)
  6. Yetkililere ihbarda bulunun
  7. Temiz bir yedekten kurtarın

YARA Kuralı İpuçları

rule Ryuk_SHA256 {
    meta:
        description = "Ryuk sample: d6b7b27e13700aaa"
        threat_level = "critical"
        first_seen = "2023-11-20"
    condition:
        hash.sha256(0, filesize) == "d6b7b27e13700aaa7f108bf9e76473717a7a1665198e9aafcc2d2227ca11bba9"
}

Ryuk — Профиль вредоносного ПО

Wizard Spider threat group ransomware (2018+). Targets large enterprises, hospitals, municipalities. RyukReadMe.html ransom note. VirtualAllocEx+WriteProcessMemory+CreateRemoteThread injection. GetIpNetTable ARP scan for lateral movement. AdjustTokenPrivileges for SeBackupPrivilege/SeDebugPrivilege.

Тип вредоносного ПО
Ransomware
Язык программирования
C
C2 Протокол
Целевые системы
Windows

Технические детали

Ryuk ransomware emerged August 2018, operated by WIZARD SPIDER (TrickBot operators). Targeted large organizations for high ransoms ($100K-$12.5M+ per victim). Distribution: delivered via TrickBot/BazarLoader infections (human-operated). Encryption: RSA-2048 + AES-256 (CBC mode), unique key per file. Stops 40+ Windows services (backup, antivirus, database) and kills >180 processes. Deletes volume shadow copies (vssadmin delete shadows /all /Quiet). Disables Windows recovery: bcdedit /set {default} recoveryenabled No. Network propagation: uses Wake-on-LAN to activate sleeping network hosts for encryption. Believed based on Hermes ransomware sold by a North Korean-linked actor on underground forums. Predecessor to Conti ransomware which emerged from WIZARD SPIDER's operations in 2020.

Атрибуция / Актор угрозы

WIZARD SPIDER (linked to Hermes/Lazarus initial code)

Возможности и поведение

Dosya Şifreleme (AES/RSA)
Gölge Kopya Silme
Yedek Kaldırma
Fidye Notu Oluşturma
Kalıcılık Sağlama
Ağ Paylaşımı Şifreleme
Anti-Analiz Teknikleri
Çift Gasp (Data Leak)

Список IOC (2 индикаторов)

IOC — Ryuk
# SHA256 d6b7b27e13700aaa7f108bf9e76473717a7a1665198e9aafcc2d2227ca11bba9 # MD5 2cc630e080bb8de5faf9f5ae87f43f8b
ТипЗначениеПримечание
sha256 d6b7b27e13700aaa7f108bf9e76473717a7a1665198e9aafcc2d2227ca11bba9
md5 2cc630e080bb8de5faf9f5ae87f43f8b

C2 Серверы (2 зарегистрированных серверов для этого семейства)

Адрес Тип Порт Протокол Статус Страна
51.161.204.106 ip 443 HTTPS sinkholed CA
162.119.249.198 ip 443 HTTPS sinkholed US

Адреса C2 предоставляются только на основе образцов вредоносного ПО, вручную проверенных командой KEYDAL. Коммерческое использование запрещено.

Теги
ryukransomwaremalwarecriticalsha256analizzenginleştirilmiş