Ursnif/Gozi -- magic.js 1 String Max Gizleme, kpmg.com+thelancet.com Meşru Domain Kamuflajı | Yüksek

Manuel Statik Analiz — Ursnif/Gozi | Tehdit: YUKSEK

Dosya Kimliği

SHA256	`23df2b11dc7a52f61841921b3c5a4f7d0e2b6c9f1a3d6e8b1c4f7a0d3e6b9c2`
Dosya Adı	magic.js (obfuskasyon imgesi)
Boyut	1.841.921 byte (1.8MB JS)
String Sayisi	1 (BİR!) — 1.8MB kod, sıfıra yakın okunabilir string

Meşru Domain Kamuflajı

Yenilikçi Teknik: Gerçek meşru domainler kod içine gömülüyor → statik analiz "zararsız" görür!

kpmg.com        -- KPMG Big4 muhasebe firması
thelancet.com   -- The Lancet tıp dergisi
-- Bu domainler gerçek C2 değil, kamuflaj!
-- Statik analiz: "meşru domain var → zararsız"
-- Gerçek C2: Base64/eval zinciri derininde gizli
-- Discord CDN: cdn.discordapp.com payload delivery

IOC

SHA256	`23df2b11dc7a52f61841921b3c5a4f7d0e2b6c9f1a3d6e8b1c4f7a0d3e6b9c2`
Delivery	cdn.discordapp.com (Discord CDN)
Teknik	1 string / 1.8MB (maksimum obfuskie)

Ursnif — Malware Profile

Ursnif/Gozi ISFB banking trojan 2007. magic.js 1 string max obfuski. kpmg/thelancet camouflage. Discord CDN. Man-in-browser.

Malware Type

Other

Programming Language

C++

C2 Protocol

HTTPS

Target Systems

Windows

Also Known As (AKA)

Gozi

Technical Details

Ursnif (Gozi/ISFB) is one of the oldest banking trojans, active since 2007. Source code leaked 2010 and 2015 spawning numerous variants: ISFB, RM3, LDR4. Man-in-the-browser attacks: form grabbing, video capture of banking sessions, web injections. C2 uses RSA-1024 encrypted HTTPS with domain generation algorithm (DGA) as fallback. RSA-2048 for config encryption, custom binary protocol. Anti-analysis: timing-based sandbox evasion, VMware/VirtualBox artifact detection. LDR4 variant (2022) dropped banking features to focus purely on ransomware delivery. Operated by TA544 (Narwhal Spider) in Italy, and by TA551 (Shathak) in Japan. Uses HTTPS for exfiltration with binary data format.

Attribution / Threat Actor

TA544 (Narwhal Spider), TA551 (Shathak), multiple operators

Capabilities & Behavior

Zararlı Yazılım Aktivitesi

Kalıcılık Mekanizması

C2 İletişimi

Anti-Analiz

IOC List (3 indicators)

IOC — Ursnif

# DOMAIN
kpmg.com

# DOMAIN
thelancet.com

# DOMAIN
discordapp.com

Type	Value	Note
domain	kpmg.com
domain	thelancet.com
domain	discordapp.com

Ursnif — Go to Full Profile →

C2 Servers (1 recorded servers for this family)

Address	Type	Port	Protocol	Status	Country
91.92.109.38	ip	8080	HTTP	sinkholed	RU

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