Ursnif | Threat Level: high | Type: Banking Trojan

Cryptographic Identifiers

SHA2561036fb7a192b5b9dcaadac2f984feacfe7146750116afa27f691f2d5ac4ffbe3
MD547bee23df74ae0ec56188d9ecf633886
File Typejs
Size482.6 KB
First Seen2023-05-31
File Nameclienti.js
Tagsbrt, Gozi, isfb, js, Ursnif

Malware Family: Ursnif

Ursnif, 2007'den beri aktiftir.

TypeBanking Trojan
Programming LanguageC++
Target PlatformWindows
C2 ProtocolHTTPS
PurposeEski bankacılık trojanı
First Seen Year2007
AliasesGozi

Threat Indicators (IOC)

  • SHA256: 1036fb7a192b5b9dcaadac2f984feacfe7146750116afa27f691f2d5ac4ffbe3
  • MD5: 47bee23df74ae0ec56188d9ecf633886

You can verify all hash values of this sample on VirusTotal.

System Cleanup Guide

  1. Disconnect the system from the network — unplug ethernet, disable Wi-Fi
  2. Terminate suspicious processes from Task Manager
  3. Run a full system scan with Malwarebytes or Kaspersky
  4. HKCU\Software\Microsoft\Windows\CurrentVersion\Run kayıtlarını kontrol edin
  5. Review newly created tasks in Task Scheduler
  6. Change all your account passwords from a clean device
  7. Gerekirse Windows'u yeniden yükleyin ve verilerinizi temiz bir yedeğe geri alın

YARA Rule Hints

rule Ursnif_SHA256 {
    meta:
        description = "Ursnif sample: 1036fb7a192b5b9d"
        threat_level = "high"
        first_seen = "2023-05-31"
    condition:
        hash.sha256(0, filesize) == "1036fb7a192b5b9dcaadac2f984feacfe7146750116afa27f691f2d5ac4ffbe3"
}

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 1036fb7a192b5b9dcaadac2f984feacfe7146750116afa27f691f2d5ac4ffbe3 # MD5 47bee23df74ae0ec56188d9ecf633886
TypeValueNote
sha256 1036fb7a192b5b9dcaadac2f984feacfe7146750116afa27f691f2d5ac4ffbe3 Sample:Ursnif
md5 47bee23df74ae0ec56188d9ecf633886 Sample:Ursnif

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.

Tags
ursnifbanking trojanmalwarehighsha256hash-analizi