Ursnif — Örnek SHA256: f8a1d78e | High Tehdit Analizi

Ursnif | Tehdit Seviyesi: high | Tür: Banking Trojan

Kriptografik Tanımlayıcılar

SHA256	`f8a1d78eb7691f90053a5d7ad70588bed4c4a5cdd7bc949c368d8c2bc62f95c4`
MD5	`1ff3761d62cc5ee7c888a8c1bdd9d1ac`
Dosya Türü	dll
Boyut	802.0 KB
İlk Görülme	2023-07-18
Dosya Adı	f8a1d78eb7691f90053a5d7ad70588bed4c4a5cdd7bc949c368d8c2bc62f95c4.bin
Etiketler	20000, dll, Gozi, Ursnif

Malware Ailesi: Ursnif

Ursnif, 2007'den beri aktiftir.

Tür	Banking Trojan
Programlama Dili	C++
Hedef Platform	Windows
C2 Protokolü	HTTPS
Amaç	Eski bankacılık trojanı
İlk Görülen Yıl	2007
Diğer İsimler	Gozi

Tehdit Göstergeleri (IOC)

SHA256: f8a1d78eb7691f90053a5d7ad70588bed4c4a5cdd7bc949c368d8c2bc62f95c4
MD5: 1ff3761d62cc5ee7c888a8c1bdd9d1ac

Bu örneğin tüm hash değerlerini VirusTotal üzerinde doğrulayabilirsiniz.

Sistem Temizleme Rehberi

Sistemi ağdan ayırın — ethernet çıkarın, Wi-Fi devre dışı bırakın
Görev Yöneticisi'nden şüpheli process'leri sonlandırın
Malwarebytes veya Kaspersky ile tam sistem taraması yapın
HKCU\Software\Microsoft\Windows\CurrentVersion\Run kayıtlarını kontrol edin
Yeni oluşturulan görevleri Task Scheduler'dan inceleyin
Tüm hesap şifrelerinizi güvenli bir cihazdan değiştirin
Gerekirse Windows'u yeniden yükleyin ve verilerinizi temiz bir yedeğe geri alın

YARA Kuralı İpuçları

rule Ursnif_SHA256 {
    meta:
        description = "Ursnif sample: f8a1d78eb7691f90"
        threat_level = "high"
        first_seen = "2023-07-18"
    condition:
        hash.sha256(0, filesize) == "f8a1d78eb7691f90053a5d7ad70588bed4c4a5cdd7bc949c368d8c2bc62f95c4"
}

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 (2 indicators)

IOC — Ursnif

# SHA256
f8a1d78eb7691f90053a5d7ad70588bed4c4a5cdd7bc949c368d8c2bc62f95c4 

# MD5
1ff3761d62cc5ee7c888a8c1bdd9d1ac

Type	Value	Note
sha256	f8a1d78eb7691f90053a5d7ad70588bed4c4a5cdd7bc949c368d8c2bc62f95c4	Sample:Ursnif
md5	1ff3761d62cc5ee7c888a8c1bdd9d1ac	Sample:Ursnif

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.