Ursnif — Örnek SHA256: a90940c5 | High Tehdit Analizi

Ursnif | Tehdit Seviyesi: high | Tür: Banking Trojan

Kriptografik Tanımlayıcılar

SHA256	`a90940c53ee9030c504e6157c565ac442a8d27bffd062bdb8f5995200b4ad8bf`
MD5	`52a80fc0c2a9ca86b40c40c2478ac7fd`
Dosya Türü	pdf
Boyut	43.3 KB
İlk Görülme	2023-03-29
Dosya Adı	3_202303034184892200.pdf
Etiketler	agenziaentrate, Gozi, MEF, mise, pdf, 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: a90940c53ee9030c504e6157c565ac442a8d27bffd062bdb8f5995200b4ad8bf
MD5: 52a80fc0c2a9ca86b40c40c2478ac7fd

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: a90940c53ee9030c"
        threat_level = "high"
        first_seen = "2023-03-29"
    condition:
        hash.sha256(0, filesize) == "a90940c53ee9030c504e6157c565ac442a8d27bffd062bdb8f5995200b4ad8bf"
}

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
a90940c53ee9030c504e6157c565ac442a8d27bffd062bdb8f5995200b4ad8bf 

# MD5
52a80fc0c2a9ca86b40c40c2478ac7fd

Type	Value	Note
sha256	a90940c53ee9030c504e6157c565ac442a8d27bffd062bdb8f5995200b4ad8bf	Sample:Ursnif
md5	52a80fc0c2a9ca86b40c40c2478ac7fd	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.