Ryuk | Bedrohungsstufe: critical | Typ: Ransomware

Kryptografische Kennungen

SHA2562ec5256a7edb90b1c05c92f79e8a48c205b29e1ac910a535aa83c30b8dbbeff8
MD5a5c70086b3bc4fe64f4e7a0aa452e620
Dateitypexe
Größe134.5 KB
Erstsichtung2020-11-05
Dateinamea5c70086b3bc4fe64f4e7a0aa452e620.exe
Tagsexe, Ransomware, Ryuk

Malware-Familie: Ryuk

Ryuk, Wizard Spider ile ilişkilidir.

TypRansomware
ProgrammierspracheC
ZielplattformWindows
C2-Protokoll
ZweckHastane hedefli ransomware
Jahr der Erstsichtung2018

Bedrohungsindikatoren (IOC)

  • SHA256: 2ec5256a7edb90b1c05c92f79e8a48c205b29e1ac910a535aa83c30b8dbbeff8
  • MD5: a5c70086b3bc4fe64f4e7a0aa452e620

Anleitung zur Systembereinigung

  1. Sistemi ağdan DERHAL ayırın — diğer cihazlara yayılmayı durdurun
  2. Zahlen Sie kein Lösegeld — es gibt keine Garantie für die Wiederherstellung
  3. Stellen Sie die betroffenen Laufwerke unter Quarantäne
  4. Kullanılan fidye yazılımı ailesini belirleyin (nomoreransom.org)
  5. Probieren Sie verfügbare Entschlüsselungstools (Projekt NoMoreRansom)
  6. Yetkililere ihbarda bulunun
  7. Temiz bir yedekten kurtarın

Hinweise für YARA-Regeln

rule Ryuk_SHA256 {
    meta:
        description = "Ryuk sample: 2ec5256a7edb90b1"
        threat_level = "critical"
        first_seen = "2020-11-05"
    condition:
        hash.sha256(0, filesize) == "2ec5256a7edb90b1c05c92f79e8a48c205b29e1ac910a535aa83c30b8dbbeff8"
}

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 2ec5256a7edb90b1c05c92f79e8a48c205b29e1ac910a535aa83c30b8dbbeff8 # MD5 a5c70086b3bc4fe64f4e7a0aa452e620
TypWertBemerkung
sha256 2ec5256a7edb90b1c05c92f79e8a48c205b29e1ac910a535aa83c30b8dbbeff8
md5 a5c70086b3bc4fe64f4e7a0aa452e620

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