加密标识符
| SHA256 | a42f37df47fdbb173c7495e18128b693b087e9a3a9a2707ad7cdf18e8c2649a1 |
|---|---|
| MD5 | 1d3f62472fb8da2d37fc1c84e7da914e |
| 文件类型 | exe |
| 大小 | 2465.3 KB |
| 首次发现 | 2025-09-07 |
| 文件名 | setup.exe |
| 标签 | exe, signed, SmokeLoader |
恶意软件家族: SmokeLoader
SmokeLoader, loader'dır.
| 类型 | Loader |
|---|---|
| 编程语言 | C |
| 目标平台 | Windows |
| C2 协议 | HTTP |
| 用途 | Loader/botnet |
| 首次发现年份 | 2011 |
| 别名 | Dofoil |
威胁指标 (IOC)
- SHA256:
a42f37df47fdbb173c7495e18128b693b087e9a3a9a2707ad7cdf18e8c2649a1 - MD5:
1d3f62472fb8da2d37fc1c84e7da914e
您可以在 VirusTotal 上验证此样本的所有哈希值。
系统清理指南
- 将系统从网络断开——加载器可能正在下载其他恶意软件
- 分析所有已下载的载荷
- 检查全部网络流量,切断可疑连接
- 执行完整的杀毒扫描
- 考虑重装系统
YARA 规则提示
rule SmokeLoader_SHA256 {
meta:
description = "SmokeLoader sample: a42f37df47fdbb17"
threat_level = "high"
first_seen = "2025-09-07"
condition:
hash.sha256(0, filesize) == "a42f37df47fdbb173c7495e18128b693b087e9a3a9a2707ad7cdf18e8c2649a1"
}
SmokeLoader — 恶意软件档案
SmokeLoader. autoruns.exe Sysinternals version info spoofing. Spaso developer PDB username. stub.pdb loader project artifact.
技术细节
SmokeLoader (Dofoil/Smoke Bot) is a modular loader/downloader active since 2011. Primary function: download and execute additional payloads (Emotet, TrickBot, FormBook, Ursnif). Heavy obfuscation: string encryption (RC4+XOR), process injection via APC, code injection. Heaven's Gate technique: switches from 32-bit to 64-bit mode to evade WoW64 hooks. Anti-analysis: CPUID-based VM detection, process listing for analysis tools, timing checks. Uses process hollowing to inject into explorer.exe or svchost.exe. C2 communication: RC4-encrypted HTTP POST requests with bot ID, campaign ID. Sold as pay-per-install (PPI) service on underground forums (~$400/1000 installs). Frequently updated to bypass detection, >100 variants documented.
归因 / 威胁行为者
Unknown (sold on underground forums, multiple operators)
能力与行为
IOC列表 (2 个指标)
# SHA256
a42f37df47fdbb173c7495e18128b693b087e9a3a9a2707ad7cdf18e8c2649a1
# MD5
1d3f62472fb8da2d37fc1c84e7da914e
| 类型 | 值 | 备注 |
|---|---|---|
| sha256 | a42f37df47fdbb173c7495e18128b693b087e9a3a9a2707ad7cdf18e8c2649a1 | Sample:SmokeLoader |
| md5 | 1d3f62472fb8da2d37fc1c84e7da914e | Sample:SmokeLoader |
C2服务器 (该家族共有 5 台已记录服务器)
| 地址 | 类型 | 端口 | 协议 | 状态 | 国家 |
|---|---|---|---|---|---|
| 80.66.75.36 | ip | 80 | HTTP | inactive | RU |
| 148.72.171.175 | ip | 80 | HTTP | inactive | US |
| 91.243.44.247 | ip | 8888 | HTTP | inactive | RU |
| 185.173.35.16 | ip | 8080 | HTTP | inactive | RU |
| torcavpcs1.atitech.com | domain | 443 | TCP | inactive | — |
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。