Ursnif | Threat Level: high | Type: Banking Trojan

Cryptographic Identifiers

SHA25632d55ac9da58cbb16197ce7b05be244984d37677e2bd4cb076d8523c025cb6c9
MD54615d39098ea0f0d9c93e3f97d5c0994
File Typejs
Size58.9 KB
First Seen2023-05-31
File Name1 Total New Invoices - Wednesday May 17 2023_1062_1.js
TagsGozi, js, Ursnif, vipbeed-com

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: 32d55ac9da58cbb16197ce7b05be244984d37677e2bd4cb076d8523c025cb6c9
  • MD5: 4615d39098ea0f0d9c93e3f97d5c0994

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: 32d55ac9da58cbb1"
        threat_level = "high"
        first_seen = "2023-05-31"
    condition:
        hash.sha256(0, filesize) == "32d55ac9da58cbb16197ce7b05be244984d37677e2bd4cb076d8523c025cb6c9"
}

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 32d55ac9da58cbb16197ce7b05be244984d37677e2bd4cb076d8523c025cb6c9 # MD5 4615d39098ea0f0d9c93e3f97d5c0994
TypeValueNote
sha256 32d55ac9da58cbb16197ce7b05be244984d37677e2bd4cb076d8523c025cb6c9 Sample:Ursnif
md5 4615d39098ea0f0d9c93e3f97d5c0994 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