Ryuk | Bedrohungsstufe: critical | Typ: Ransomware

Kryptografische Kennungen

SHA25623f8aa94ffb3c08a62735fe7fee5799880a8f322ce1d55ec49a13a3f85312db2
MD55ac0f050f93f86e69026faea1fbb4450
Dateitypexe
Größe384.0 KB
Erstsichtung2022-02-17
Dateiname23f8aa94ffb3c08a62735fe7fee5799880a8f322ce1d55ec49a13a3f85312db2
Tagsexe, Ryuk

Malware-Familie: Ryuk

Ryuk, Wizard Spider ile ilişkilidir.

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

Bedrohungsindikatoren (IOC)

  • SHA256: 23f8aa94ffb3c08a62735fe7fee5799880a8f322ce1d55ec49a13a3f85312db2
  • MD5: 5ac0f050f93f86e69026faea1fbb4450

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: 23f8aa94ffb3c08a"
        threat_level = "critical"
        first_seen = "2022-02-17"
    condition:
        hash.sha256(0, filesize) == "23f8aa94ffb3c08a62735fe7fee5799880a8f322ce1d55ec49a13a3f85312db2"
}

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 23f8aa94ffb3c08a62735fe7fee5799880a8f322ce1d55ec49a13a3f85312db2 # MD5 5ac0f050f93f86e69026faea1fbb4450
TypWertBemerkung
sha256 23f8aa94ffb3c08a62735fe7fee5799880a8f322ce1d55ec49a13a3f85312db2
md5 5ac0f050f93f86e69026faea1fbb4450

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