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

Manuel Statik Analiz — Ursnif/Gozi | Tehdit: YUKSEK

Fichier Kimliği

SHA256	`23df2b11dc7a52f61841921b3c5a4f7d0e2b6c9f1a3d6e8b1c4f7a0d3e6b9c2`
Nom du fichier	magic.js (obfuskasyon imgesi)
Taille	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 — Profil du malware

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

Type de malware

Other

Langage de programmation

C++

Protocole C2

HTTPS

Systèmes ciblés

Windows

Aussi connu sous (AKA)

Gozi

Détails techniques

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 / Acteur de la menace

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

Capacités et comportement

Zararlı Yazılım Aktivitesi

Kalıcılık Mekanizması

C2 İletişimi

Anti-Analiz

Liste IOC (3 indicateurs)

IOC — Ursnif

# DOMAIN
kpmg.com

# DOMAIN
thelancet.com

# DOMAIN
discordapp.com

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

Ursnif — Voir le profil complet →

Serveurs C2 (1 serveurs enregistrés pour cette famille)

Adresse	Type	Port	Protocole	Statut	Pays
91.92.109.38	ip	8080	HTTP	sinkholed	RU

Les adresses C2 proviennent uniquement d'échantillons de malwares vérifiés manuellement par l'équipe KEYDAL. Toute utilisation commerciale est interdite.