加密标识符
| SHA256 | 2ec5256a7edb90b1c05c92f79e8a48c205b29e1ac910a535aa83c30b8dbbeff8 |
|---|---|
| MD5 | a5c70086b3bc4fe64f4e7a0aa452e620 |
| 文件类型 | exe |
| 大小 | 134.5 KB |
| 首次发现 | 2020-11-05 |
| 文件名 | a5c70086b3bc4fe64f4e7a0aa452e620.exe |
| 标签 | exe, Ransomware, Ryuk |
恶意软件家族: Ryuk
Ryuk, Wizard Spider ile ilişkilidir.
| 类型 | Ransomware |
|---|---|
| 编程语言 | C |
| 目标平台 | Windows |
| C2 协议 | — |
| 用途 | Hastane hedefli ransomware |
| 首次发现年份 | 2018 |
威胁指标 (IOC)
- SHA256:
2ec5256a7edb90b1c05c92f79e8a48c205b29e1ac910a535aa83c30b8dbbeff8 - MD5:
a5c70086b3bc4fe64f4e7a0aa452e620
系统清理指南
- Sistemi ağdan DERHAL ayırın — diğer cihazlara yayılmayı durdurun
- 不要支付赎金——无法保证恢复文件
- 隔离受影响的驱动器
- Kullanılan fidye yazılımı ailesini belirleyin (nomoreransom.org)
- 尝试可用的解密工具（NoMoreRansom 项目）
- Yetkililere ihbarda bulunun
- Temiz bir yedekten kurtarın
YARA 规则提示
rule Ryuk_SHA256 {
meta:
description = "Ryuk sample: 2ec5256a7edb90b1"
threat_level = "critical"
first_seen = "2020-11-05"
condition:
hash.sha256(0, filesize) == "2ec5256a7edb90b1c05c92f79e8a48c205b29e1ac910a535aa83c30b8dbbeff8"
}Ryuk — 恶意软件档案
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.
技术细节
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.
归因 / 威胁行为者
WIZARD SPIDER (linked to Hermes/Lazarus initial code)
能力与行为
IOC列表 (2 个指标)
# SHA256
2ec5256a7edb90b1c05c92f79e8a48c205b29e1ac910a535aa83c30b8dbbeff8
# MD5
a5c70086b3bc4fe64f4e7a0aa452e620
| 类型 | 值 | 备注 |
|---|---|---|
| sha256 | 2ec5256a7edb90b1c05c92f79e8a48c205b29e1ac910a535aa83c30b8dbbeff8 | |
| md5 | a5c70086b3bc4fe64f4e7a0aa452e620 |
C2服务器 (该家族共有 2 台已记录服务器)
| 地址 | 类型 | 端口 | 协议 | 状态 | 国家 |
|---|---|---|---|---|---|
| 51.161.204.106 | ip | 443 | HTTPS | sinkholed | CA |
| 162.119.249.198 | ip | 443 | HTTPS | sinkholed | US |
C2 地址仅来自 KEYDAL 团队人工验证的恶意软件样本。禁止用于商业用途。