FormBook | Threat Level: high | Type: Infostealer

Cryptographic Identifiers

SHA2567caff20c50d04bc06593d5ab21ac8c3b66102bc29b3e23a67278290cc7efce9d
MD581d0e55445e0d1d3732214be200d5d7f
File Typerar
Size7.2 KB
First Seen2026-06-12
File NameSWIFTXUSDX22.496,32X20261032254113.rar
TagsFormBook, rar

Malware Family: FormBook

FormBook, MaaS stealer'dır.

TypeInfostealer
Programming LanguageC
Target PlatformWindows
C2 ProtocolHTTP
PurposeForm verisi hırsızlığı
First Seen Year2016
AliasesxLoader

Threat Indicators (IOC)

  • SHA256: 7caff20c50d04bc06593d5ab21ac8c3b66102bc29b3e23a67278290cc7efce9d
  • MD5: 81d0e55445e0d1d3732214be200d5d7f

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

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: 7caff20c50d04bc0"
        threat_level = "high"
        first_seen = "2026-06-12"
    condition:
        hash.sha256(0, filesize) == "7caff20c50d04bc06593d5ab21ac8c3b66102bc29b3e23a67278290cc7efce9d"
}

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 7caff20c50d04bc06593d5ab21ac8c3b66102bc29b3e23a67278290cc7efce9d # MD5 81d0e55445e0d1d3732214be200d5d7f
TypeValueNote
sha256 7caff20c50d04bc06593d5ab21ac8c3b66102bc29b3e23a67278290cc7efce9d Sample:FormBook
md5 81d0e55445e0d1d3732214be200d5d7f Sample:FormBook

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
formbookinfostealermalwarehighsha256hash-analizi