Ryuk | Tehdit Seviyesi: critical | Tür: Ransomware

Kriptografik Tanımlayıcılar

SHA256302fa0883fe21e4d0b56c68574a8073edb05b20325c41ea41e6d4e4005d0f9e1
MD53d3fce34e2092be6629eb75cee97ec69
Dosya Türüexe
Boyut1055.5 KB
İlk Görülme2024-04-15
Dosya Adı3d3fce34e2092be6629eb75cee97ec69.exe
Etiketlerexe, HUN, 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: 302fa0883fe21e4d0b56c68574a8073edb05b20325c41ea41e6d4e4005d0f9e1
  • MD5: 3d3fce34e2092be6629eb75cee97ec69

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: 302fa0883fe21e4d"
        threat_level = "critical"
        first_seen = "2024-04-15"
    condition:
        hash.sha256(0, filesize) == "302fa0883fe21e4d0b56c68574a8073edb05b20325c41ea41e6d4e4005d0f9e1"
}

Ryuk — Malware-Profil

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.

Malware-Typ
Ransomware
Programmiersprache
C
C2-Protokoll
Zielsysteme
Windows

Technische Details

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.

Attribution / Bedrohungsakteur

WIZARD SPIDER (linked to Hermes/Lazarus initial code)

Fähigkeiten & Verhalten

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

IOC-Liste (2 Indikatoren)

IOC — Ryuk
# SHA256 302fa0883fe21e4d0b56c68574a8073edb05b20325c41ea41e6d4e4005d0f9e1 # MD5 3d3fce34e2092be6629eb75cee97ec69
TypWertBemerkung
sha256 302fa0883fe21e4d0b56c68574a8073edb05b20325c41ea41e6d4e4005d0f9e1
md5 3d3fce34e2092be6629eb75cee97ec69

C2-Server (2 erfasste Server für diese Familie)

Adresse Typ Port Protokoll Status Land
51.161.204.106 ip 443 HTTPS sinkholed CA
162.119.249.198 ip 443 HTTPS sinkholed US

C2-Adressen stammen ausschließlich aus vom KEYDAL-Team manuell verifizierten Malware-Samples. Kommerzielle Nutzung ist untersagt.

Tags
ryukransomwaremalwarecriticalsha256analizzenginleştirilmiş