FormBook | Threat Level: high | Type: Infostealer

Cryptographic Identifiers

SHA2566c417a7be904852d37d6e345a6b711976ad426d31e4ab7bab58a7d3440142996
MD51078e2966c0d86d1d87a2408e2ad4701
File Typerar
Size843.5 KB
First Seen2026-06-12
File NameDOWNXPAYMENTXCOPY_20260510_160955_0000.rar
TagsFormBook, rar

Malware Family: FormBook

FormBook, MaaS infostealer'dır.

TypeInfostealer
Programming LanguageC
Target PlatformWindows
C2 ProtocolHTTP
PurposeForm verisi, tuş kaydı
First Seen Year2016
AliasesxLoader

Threat Indicators (IOC)

  • SHA256: 6c417a7be904852d37d6e345a6b711976ad426d31e4ab7bab58a7d3440142996
  • MD5: 1078e2966c0d86d1d87a2408e2ad4701

System Cleanup Guide

  1. Disconnect the system from the network immediately
  2. Yeni bir cihazdan banka hesabı, sosyal medya ve e-posta şifrelerini değiştirin
  3. Move crypto wallets to a new address and abandon the old ones
  4. Start a full scan with up-to-date antivirus
  5. Clear saved browser passwords and enable 2FA
  6. Sign out of all sessions on every affected service

YARA Rule Hints

rule FormBook_SHA256 {
    meta:
        description = "FormBook sample: 6c417a7be904852d"
        threat_level = "high"
        first_seen = "2026-06-12"
    condition:
        hash.sha256(0, filesize) == "6c417a7be904852d37d6e345a6b711976ad426d31e4ab7bab58a7d3440142996"
}

FormBook — Malware Profile

FormBook web form verisi ve credential hırsızı. SmartAssembly paketleyici. İspanyolca LATAM elektrik faturası lür.

Malware Type
Infostealer
Programming Language
C
C2 Protocol
HTTP
Target Systems
Windows
Also Known As (AKA)
xLoader

Technical Details

C dili, Windows API hooking (form grabbing), HTTP POST C2, browser form stealer, keylogger, screenshot, clipboard monitor, process injection (process hollowing)

Attribution / Threat Actor

ABD'de gelistirilmis; satis darknet forumlari uzerinden yapilmis. Dunya genelindeki multuple suc gruplarina hizmet veren MaaS platformu.

Capabilities & Behavior

Tarayıcı Kimlik Bilgileri
Çerez Hırsızlığı
Kripto Cüzdan Çalma
Sistem Bilgisi
Ekran Görüntüsü
FTP/SSH İstemci Şifreleri
E-posta İstemcisi Çalma
Veri Sızıntısı

IOC List (2 indicators)

IOC — FormBook
# SHA256 6c417a7be904852d37d6e345a6b711976ad426d31e4ab7bab58a7d3440142996 # MD5 1078e2966c0d86d1d87a2408e2ad4701
TypeValueNote
sha256 6c417a7be904852d37d6e345a6b711976ad426d31e4ab7bab58a7d3440142996
md5 1078e2966c0d86d1d87a2408e2ad4701

C2 Servers (5 recorded servers for this family)

Address Type Port Protocol Status Country
45.61.136.16 ip 80 HTTP active US
hxxp://freeupgrades.net/s1xt/ domain 80 HTTP inactive US
103.75.160.239 ip 443 HTTPS inactive HK
3.29.19.86 ip — TCP inactive —
form-book.club domain 80 HTTP sinkholed —

C2 addresses are provided only from malware samples manually verified by the KEYDAL team. Commercial use is prohibited.

Tags
formbookinfostealermalwarehighsha256analizzenginleştirilmiş