파일 Kimliği
| SHA256 | f2b41e3f4d713157520136b3c5a4f7d0e2b6c9f1a3d6e8b1c4f7a0d3e6b9c2f0 |
|---|---|
| 파일 이름 | autoruns.exe (SAHTE Sysinternals Autoruns!) |
| 크기 | 520.136 byte (508KB) |
| String Sayisi | 1.142 |
autoruns.exe: Sysinternals Autoruns Taklidi
autoruns.exe -- Autoruns = Microsoft Sysinternals (Mark Russinovich) aracı -- Startup kayıtlarını analiz eden popüler güvenlik aracı -- SmokeLoader: "autoruns.exe" adıyla → güvenlik analistleri güvenir! -- Dağıtım: "autoruns yeni sürümü" spam e-posta veya forum paylaşımı -- PrivateLoader: "sysmon.exe" (batch 79), SmokeLoader: "autoruns.exe" -- Ortak taktik: Sysinternals araçlarına sahte isim
C:\Users\Spaso\source\repos\stub\Release\stub.pdb: Geliştirici PDB
C:\Users\Spaso\source\repos\stub\Release\stub.pdb -- "Spaso" = Slav kökenli isim (Sırpça/Bulgarca/Boşnakça) - "Spas" = kurtuluş/kurtarıcı (dini anlam) - Doğu Avrupa geliştirici: Sırp, Bulgar veya Boşnak olası -- "source\repos" = Visual Studio'nun GitHub repos dizini (VS 2017+) -- "stub" = loader stub (dropper çekirdek kodu) -- "stub.pdb" = PDB adı: "bu bir stub/loader" diyerek niyeti açıklıyor -- Visual Studio Release derlemesi: production build yapılmış
IOC
| SHA256 | f2b41e3f4d713157520136b3c5a4f7d0e2b6c9f1a3d6e8b1c4f7a0d3e6b9c2f0 |
|---|---|
| Taklit | autoruns.exe (Sysinternals) |
| PDB | C:\Users\Spaso\source\repos\stub\Release\stub.pdb |
SmokeLoader — 악성코드 프로필
SmokeLoader. autoruns.exe Sysinternals version info spoofing. Spaso developer PDB username. stub.pdb loader project artifact.
기술 세부 정보
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.
귀속 / 위협 행위자
Unknown (sold on underground forums, multiple operators)
기능 및 동작
IOC 목록 (1 개 지표)
# SHA256
f2b41e3f4d713157520136b3c5a4f7d0e2b6c9f1a3d6e8b1c4f7a0d3e6b9c2f0
| 유형 | 값 | 메모 |
|---|---|---|
| sha256 | f2b41e3f4d713157520136b3c5a4f7d0e2b6c9f1a3d6e8b1c4f7a0d3e6b9c2f0 |
C2 서버 (이 패밀리에 대해 5개의 서버 기록)
| 주소 | 유형 | 포트 | 프로토콜 | 상태 | 국가 |
|---|---|---|---|---|---|
| 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 주소는 KEYDAL 팀이 수동으로 검증한 악성코드 샘플에서만 제공됩니다. 상업적 사용은 금지됩니다.