Ursnif - custm.log [d0f5b9d6]

Tehdit Degerlendirmesi

Bu ornek, hedef sisteme ek zararlı yazılım yuklemek amacıyla tasarlanmis moduler bir yukleyici (loader) olarak tespit edilmistir. Bankacılık trojanları, fidye yazılımları veya diger ikinci asama yukler indirebilmektedir.

Tespit Edilen Yetenekler

• Payload Indirme
• Surec Enjeksiyonu
• Kalicilik
• Anti-Analiz
• Sifrelenmis Iletisim

MalwareBazaar Etiketleri

Analiz Notu

Bu ornek Ursnif ailesine ait ve MalwareBazaar platformundan alınmıstır. KEYDAL Guvenlik Arastirmaları tarafından metadata analizi gerceklestirilmis ve IOC veritabanına eklenmistir.

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 Copy

# SHA256 d0f5b9d6db0482d92ec833a86453691ac61301dd66e03d3bcf304c72e4d9bb9e # MD5 5c24599aeb7b76f857e83f671183fcf6

Type	Value	Note
sha256	d0f5b9d6db0482d92ec833a86453691ac61301dd66e03d3bcf304c72e4d9bb9e
md5	5c24599aeb7b76f857e83f671183fcf6

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.