Dridex2 -- DeletePrinterConnectionW Print Spooler Lateral Movement, DirectUI Browser Enjeksiyon, GetModuleFileNameExW | Yüksek

Manuel Statik Analiz — Dridex Banking Trojan | Tehdit: YUKSEK

Dosya Kimliği

SHA256	`123a833c6ad4fefb1007633b3c5a4f7d0e2b6c9f1a3d6e8b1c4f7a0d3e6b9c2f`
Boyut	1.007.633 byte (984KB)
String Sayisi	6.342

DeletePrinterConnectionW: Print Spooler Lateral Movement

LATERAL MOVEMENT: Yazıcı bileşeni üzerinden yanal hareket!

DeletePrinterConnectionW (winspool.drv)
-- Print Spooler servisi API
-- Dridex: PrintNightmare/SpoolFool vektörü değil — ağ yazıcısı kaldırma
-- Kurumsal ağlarda yazıcı paylaşımı üzerinden yanal hareket
-- "DeletePrinterConnection" = uzak yazıcı bağlantısı kaldır
-- Ağ yazıcısı UNC yolu aracılığıyla komşu sunuculara erişim

DirectUI: IE/Edge Browser Enjeksiyonu

??4DuiNavigate@DirectUI@@QEAAAEAV01@AEBV01@@Z
?AccNavigate@DuiAccess...
-- DirectUI = Internet Explorer'ın dahili UI kütüphanesi
-- "DuiNavigate" = IE form navigasyon olayı
-- Dridex: IE/Edge form gönderimi sırasında "form grab" yapıyor
-- Banka giriş formu → kullanıcı Submit'e tıklayınca veri çalıyor
-- Encrypted HTTPS'e rağmen çalışır (plaintext DOM seviyesinde)

Süreç Numaralama

GetModuleFileNameExW -- çalışan modüllerin yollarını al
-- Dridex: AV/sandbox process'i var mı kontrol ediyor
-- Her çalışan exe'nin tam yolu → güvenlik aracı tespiti

IOC

SHA256	`123a833c6ad4fefb1007633b3c5a4f7d0e2b6c9f1a3d6e8b1c4f7a0d3e6b9c2f`
Teknik	DirectUI browser injection + Print Spooler lateral

Dridex — Malware Profile

Dridex Bugat TA505 banking trojan. Chrome/Firefox form hooking with obfuscated strings. DirectUI RTTI.

Malware Type

Other

Programming Language

C++

C2 Protocol

HTTPS

Target Systems

Windows

Also Known As (AKA)

Bugat

Technical Details

Dridex (Bugat/Cridex) is a modular banking trojan operated by TA505/Evil Corp since 2011. Uses peer-to-peer botnet architecture for C2 communication to resist takedowns. Modules: form grabber, VNC backdoor, network proxy, credential stealer, spread module. Encrypted communication: RC4 + custom protocol over HTTP. Delivered via Microsoft Office macro phishing (VBA macros). Used to deliver: BitPaymer, WastedLocker, Grief (PayOrGrief) ransomware. Evil Corp sanctioned by US Treasury October 2019, making ransom payments illegal for US entities. Dridex infrastructure heavily overlaps with Locky ransomware campaigns. Botnet IDs (bot IDs): 220, 444, 7777, multiple active botnets simultaneously.

Attribution / Threat Actor

Evil Corp (TA505), Maksim Yakubets (indicted by FBI)

Capabilities & Behavior

Zararlı Yazılım Aktivitesi

Kalıcılık Mekanizması

C2 İletişimi

Anti-Analiz

IOC List (1 indicators)

IOC — Dridex

# SHA256
123a833c6ad4fefb1007633b3c5a4f7d0e2b6c9f1a3d6e8b1c4f7a0d3e6b9c2f

Type	Value	Note
sha256	123a833c6ad4fefb1007633b3c5a4f7d0e2b6c9f1a3d6e8b1c4f7a0d3e6b9c2f

Dridex — Go to Full Profile →

C2 Servers (3 recorded servers for this family)

Address	Type	Port	Protocol	Status	Country
79.141.164.52	ip	4444	TCP	sinkholed	RO
185.234.218.151	ip	4444	HTTPS	sinkholed	RU
77.73.133.84	ip	443	HTTPS	sinkholed	BG

C2 addresses are provided only from malware samples manually verified by the KEYDAL team. Commercial use is prohibited.