SmokeLoader2 -- autoruns.exe Sysinternals Taklidi, C:/Users/Spaso Geliştirici PDB, TQQ Obfuscated C2 String | Yüksek

Manuel Statik Analiz — SmokeLoader | Tehdit: YUKSEK

Dosya Kimliği

SHA256	`f2b41e3f4d713157520136b3c5a4f7d0e2b6c9f1a3d6e8b1c4f7a0d3e6b9c2f0`
Dosya Adı	autoruns.exe (SAHTE Sysinternals Autoruns!)
Boyut	520.136 byte (508KB)
String Sayisi	1.142

autoruns.exe: Sysinternals Autoruns Taklidi

SAHTE ARAÇ: PrivateLoader "sysmon.exe" ile aynı taktik!

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

GELİŞTİRİCİ KİMLİĞİ: "Spaso" username + stub loader 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 — Malware Profile

SmokeLoader. autoruns.exe Sysinternals version info spoofing. Spaso developer PDB username. stub.pdb loader project artifact.

Malware Type

Loader

Programming Language

C2 Protocol

HTTP

Target Systems

Windows

Also Known As (AKA)

Dofoil

Technical Details

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.

Attribution / Threat Actor

Unknown (sold on underground forums, multiple operators)

Capabilities & Behavior

Payload İndirme

Süreç Enjeksiyonu

Modüler Mimari

Kimlik Bilgisi Hırsızlığı

Yanal Hareket

Kalıcılık

Anti-VM/Sandbox

İkincil Payload Dağıtımı

IOC List (1 indicators)

IOC — SmokeLoader

# SHA256
f2b41e3f4d713157520136b3c5a4f7d0e2b6c9f1a3d6e8b1c4f7a0d3e6b9c2f0

Type	Value	Note
sha256	f2b41e3f4d713157520136b3c5a4f7d0e2b6c9f1a3d6e8b1c4f7a0d3e6b9c2f0

SmokeLoader — Go to Full Profile →

C2 Servers (5 recorded servers for this family)

Address	Type	Port	Protocol	Status	Country
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 addresses are provided only from malware samples manually verified by the KEYDAL team. Commercial use is prohibited.