ファイル Kimliği
| SHA256 | 23df2b11dc7a52f61841921b3c5a4f7d0e2b6c9f1a3d6e8b1c4f7a0d3e6b9c2 |
|---|---|
| ファイル名 | magic.js (obfuskasyon imgesi) |
| サイズ | 1.841.921 byte (1.8MB JS) |
| String Sayisi | 1 (BİR!) — 1.8MB kod, sıfıra yakın okunabilir string |
Meşru Domain Kamuflajı
kpmg.com -- KPMG Big4 muhasebe firması thelancet.com -- The Lancet tıp dergisi -- Bu domainler gerçek C2 değil, kamuflaj! -- Statik analiz: "meşru domain var → zararsız" -- Gerçek C2: Base64/eval zinciri derininde gizli -- Discord CDN: cdn.discordapp.com payload delivery
IOC
| SHA256 | 23df2b11dc7a52f61841921b3c5a4f7d0e2b6c9f1a3d6e8b1c4f7a0d3e6b9c2 |
|---|---|
| Delivery | cdn.discordapp.com (Discord CDN) |
| Teknik | 1 string / 1.8MB (maksimum obfuskie) |
Ursnif — マルウェアプロファイル
Ursnif/Gozi ISFB banking trojan 2007. magic.js 1 string max obfuski. kpmg/thelancet camouflage. Discord CDN. Man-in-browser.
技術詳細
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.
アトリビューション / 脅威アクター
TA544 (Narwhal Spider), TA551 (Shathak), multiple operators
機能と挙動
IOCリスト (3 件の指標)
# DOMAIN
kpmg.com
# DOMAIN
thelancet.com
# DOMAIN
discordapp.com
| タイプ | 値 | メモ |
|---|---|---|
| domain | kpmg.com | |
| domain | thelancet.com | |
| domain | discordapp.com |
C2サーバー (このファミリーで1台のサーバーを記録)
| アドレス | タイプ | ポート | プロトコル | ステータス | 国 |
|---|---|---|---|---|---|
| 91.92.109.38 | ip | 8080 | HTTP | sinkholed | RU |
C2アドレスはKEYDALチームが手動で検証したマルウェア検体のみに基づいて提供されています。商用利用は禁止です。