SmokeLoader | Threat Level: high | Type: Loader

Cryptographic Identifiers

SHA25690bc8a0bbefdcd114c58962e344314dcb07f897b652afc67874fb4feb7d46650
MD5128c2f4875c2c221f3f7be854b77186d
File Typeexe
Size1131.6 KB
First Seen2025-01-09
File Namesmokeloader.exe
Tagsexe, Smoke Loader, SmokeLoader

Malware Family: SmokeLoader

SmokeLoader, loader'dır.

TypeLoader
Programming LanguageC
Target PlatformWindows
C2 ProtocolHTTP
PurposeLoader/botnet
First Seen Year2011
AliasesDofoil

Threat Indicators (IOC)

  • SHA256: 90bc8a0bbefdcd114c58962e344314dcb07f897b652afc67874fb4feb7d46650
  • MD5: 128c2f4875c2c221f3f7be854b77186d

You can verify all hash values of this sample on VirusTotal.

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: 90bc8a0bbefdcd11"
        threat_level = "high"
        first_seen = "2025-01-09"
    condition:
        hash.sha256(0, filesize) == "90bc8a0bbefdcd114c58962e344314dcb07f897b652afc67874fb4feb7d46650"
}

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 90bc8a0bbefdcd114c58962e344314dcb07f897b652afc67874fb4feb7d46650 # MD5 128c2f4875c2c221f3f7be854b77186d
TypeValueNote
sha256 90bc8a0bbefdcd114c58962e344314dcb07f897b652afc67874fb4feb7d46650 Sample:SmokeLoader
md5 128c2f4875c2c221f3f7be854b77186d Sample:SmokeLoader

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
smokeloaderloadermalwarehighsha256hash-analizi