SmokeLoader | Threat Level: high | Type: Loader

Cryptographic Identifiers

SHA256d28437f0d1be864079538b0e4dd2e2f56efd86ec1b863a178861e696b186eba8
MD550f421e4266ecb2a42cb26195b6534ec
File Typehta
Size140.8 KB
First Seen2025-01-17
File Namesheismybestgirlforentiretimegivenmebestthingsforever.hta
Tagshta, Smoke Loader, SmokeLoader

Malware Family: SmokeLoader

SmokeLoader, modüler loader/botnet'tir.

TypeLoader
Programming LanguageC
Target PlatformWindows
C2 ProtocolHTTP
PurposeEk yük indiren botnet
First Seen Year2011
AliasesDofoil

Threat Indicators (IOC)

  • SHA256: d28437f0d1be864079538b0e4dd2e2f56efd86ec1b863a178861e696b186eba8
  • MD5: 50f421e4266ecb2a42cb26195b6534ec

System Cleanup Guide

  1. Disconnect the system from the network — the loader may be downloading more malware
  2. Analyze every downloaded payload
  3. Inspect all network traffic and cut suspicious connections
  4. Run a full antivirus scan
  5. Consider reimaging the system

YARA Rule Hints

rule SmokeLoader_SHA256 {
    meta:
        description = "SmokeLoader sample: d28437f0d1be8640"
        threat_level = "high"
        first_seen = "2025-01-17"
    condition:
        hash.sha256(0, filesize) == "d28437f0d1be864079538b0e4dd2e2f56efd86ec1b863a178861e696b186eba8"
}

SmokeLoader — Malware Profile

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

Malware Type
Loader
Programming Language
C
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 (2 indicators)

IOC — SmokeLoader
# SHA256 d28437f0d1be864079538b0e4dd2e2f56efd86ec1b863a178861e696b186eba8 # MD5 50f421e4266ecb2a42cb26195b6534ec
TypeValueNote
sha256 d28437f0d1be864079538b0e4dd2e2f56efd86ec1b863a178861e696b186eba8
md5 50f421e4266ecb2a42cb26195b6534ec

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.

Tags
smokeloaderloadermalwarehighsha256analizzenginleştirilmiş