SmokeLoader | Threat Level: high | Type: Loader

Cryptographic Identifiers

SHA256fbfd99e25fba544cb1c7cc420b11d1048289ae02dcc50eb44566a959c17589cb
MD5d0afd781ce8872358047a5857f4dcb8a
File Typeexe
Size2596.4 KB
First Seen2025-12-07
File Namehpwdv.exe
Tagsexe, 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: fbfd99e25fba544cb1c7cc420b11d1048289ae02dcc50eb44566a959c17589cb
  • MD5: d0afd781ce8872358047a5857f4dcb8a

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: fbfd99e25fba544c"
        threat_level = "high"
        first_seen = "2025-12-07"
    condition:
        hash.sha256(0, filesize) == "fbfd99e25fba544cb1c7cc420b11d1048289ae02dcc50eb44566a959c17589cb"
}

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 fbfd99e25fba544cb1c7cc420b11d1048289ae02dcc50eb44566a959c17589cb # MD5 d0afd781ce8872358047a5857f4dcb8a
TypeValueNote
sha256 fbfd99e25fba544cb1c7cc420b11d1048289ae02dcc50eb44566a959c17589cb Sample:SmokeLoader
md5 d0afd781ce8872358047a5857f4dcb8a 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