Cryptographic Identifiers
| SHA256 | 6b22aa631597af44672174cec2c7e6c87741db9bcca6c59cf54eade02dae451b |
|---|---|
| MD5 | 8c282f124ed2f977a12b91ae572e9f05 |
| File Type | exe |
| Size | 2501.7 KB |
| First Seen | 2023-03-10 |
| File Name | 2023-03-09_8c282f124ed2f977a12b91ae572e9f05_ryuk |
| Tags | Ryuk |
Malware Family: Ryuk
Ryuk, Wizard Spider ile ilişkilidir.
| Type | Ransomware |
|---|---|
| Programming Language | C |
| Target Platform | Windows |
| C2 Protocol | — |
| Purpose | Hastane hedefli ransomware |
| First Seen Year | 2018 |
Threat Indicators (IOC)
- SHA256:
6b22aa631597af44672174cec2c7e6c87741db9bcca6c59cf54eade02dae451b - MD5:
8c282f124ed2f977a12b91ae572e9f05
System Cleanup Guide
- Sistemi ağdan DERHAL ayırın — diğer cihazlara yayılmayı durdurun
- Do not pay the ransom — there is no guarantee your files will be restored
- Quarantine the affected drives
- Kullanılan fidye yazılımı ailesini belirleyin (nomoreransom.org)
- Try available decryptor tools (the NoMoreRansom project)
- Yetkililere ihbarda bulunun
- Temiz bir yedekten kurtarın
YARA Rule Hints
rule Ryuk_SHA256 {
meta:
description = "Ryuk sample: 6b22aa631597af44"
threat_level = "critical"
first_seen = "2023-03-10"
condition:
hash.sha256(0, filesize) == "6b22aa631597af44672174cec2c7e6c87741db9bcca6c59cf54eade02dae451b"
}Ryuk — Malware Profile
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.
Technical 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 / Threat Actor
WIZARD SPIDER (linked to Hermes/Lazarus initial code)
Capabilities & Behavior
IOC List (2 indicators)
# SHA256
6b22aa631597af44672174cec2c7e6c87741db9bcca6c59cf54eade02dae451b
# MD5
8c282f124ed2f977a12b91ae572e9f05
| Type | Value | Note |
|---|---|---|
| sha256 | 6b22aa631597af44672174cec2c7e6c87741db9bcca6c59cf54eade02dae451b | |
| md5 | 8c282f124ed2f977a12b91ae572e9f05 |
C2 Servers (2 recorded servers for this family)
| Address | Type | Port | Protocol | Status | Country |
|---|---|---|---|---|---|
| 51.161.204.106 | ip | 443 | HTTPS | sinkholed | CA |
| 162.119.249.198 | ip | 443 | HTTPS | sinkholed | US |
C2 addresses are provided only from malware samples manually verified by the KEYDAL team. Commercial use is prohibited.