Cryptographic Identifiers
| SHA256 | 5f6c6f15482b852c69d68e3e73426add7a5c85ff50b5dd375f1cbdadd434b9e6 |
|---|---|
| MD5 | ec0c8b6d5a4a3784f72d686649db7313 |
| File Type | |
| Size | 24.5 KB |
| First Seen | 2023-03-21 |
| File Name | RIMESSA_CASSEGNI21032023-6969.pdf |
| Tags | GLS, Gozi, ITA, megabiger-com, pdf, Ursnif |
Malware Family: Ursnif
Ursnif, eski trojan'dır.
| Type | Banking Trojan |
|---|---|
| Programming Language | C++ |
| Target Platform | Windows |
| C2 Protocol | HTTPS |
| Purpose | Bankacılık trojanı |
| First Seen Year | 2007 |
| Aliases | Gozi |
Threat Indicators (IOC)
- SHA256:
5f6c6f15482b852c69d68e3e73426add7a5c85ff50b5dd375f1cbdadd434b9e6 - MD5:
ec0c8b6d5a4a3784f72d686649db7313
You can verify all hash values of this sample on VirusTotal.
System Cleanup Guide
- Disconnect the system from the network — unplug ethernet, disable Wi-Fi
- Terminate suspicious processes from Task Manager
- Run a full system scan with Malwarebytes or Kaspersky
- HKCU\Software\Microsoft\Windows\CurrentVersion\Run kayıtlarını kontrol edin
- Review newly created tasks in Task Scheduler
- Change all your account passwords from a clean device
- Gerekirse Windows'u yeniden yükleyin ve verilerinizi temiz bir yedeğe geri alın
YARA Rule Hints
rule Ursnif_SHA256 {
meta:
description = "Ursnif sample: 5f6c6f15482b852c"
threat_level = "high"
first_seen = "2023-03-21"
condition:
hash.sha256(0, filesize) == "5f6c6f15482b852c69d68e3e73426add7a5c85ff50b5dd375f1cbdadd434b9e6"
}
Ursnif — Malware Profile
Ursnif/Gozi ISFB banking trojan 2007. magic.js 1 string max obfuski. kpmg/thelancet camouflage. Discord CDN. Man-in-browser.
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
IOC List (2 indicators)
# SHA256
5f6c6f15482b852c69d68e3e73426add7a5c85ff50b5dd375f1cbdadd434b9e6
# MD5
ec0c8b6d5a4a3784f72d686649db7313
| Type | Value | Note |
|---|---|---|
| sha256 | 5f6c6f15482b852c69d68e3e73426add7a5c85ff50b5dd375f1cbdadd434b9e6 | Sample:Ursnif |
| md5 | ec0c8b6d5a4a3784f72d686649db7313 | 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.