MassLogger | Threat Level: medium | Type: Infostealer

Cryptographic Identifiers

SHA2563e11dfb1ac52e8a170ab4af6b85a43f25cce6299afe8589abd04559b33dabcb9
MD525b85751cc8f7defd3384b978a4bbabb
File Typeexe
Size970.0 KB
First Seen2025-10-17
File Namewhatsapp specification image9017.exe
Tagsexe, MassLogger

Malware Family: MassLogger

MassLogger, email keylogger'dır.

TypeInfostealer
Programming LanguageC#/.NET
Target PlatformWindows
C2 ProtocolSMTP/FTP
PurposeEmail keylogger
First Seen Year2020

Threat Indicators (IOC)

  • SHA256: 3e11dfb1ac52e8a170ab4af6b85a43f25cce6299afe8589abd04559b33dabcb9
  • MD5: 25b85751cc8f7defd3384b978a4bbabb

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 MassLogger_SHA256 {
    meta:
        description = "MassLogger sample: 3e11dfb1ac52e8a1"
        threat_level = "medium"
        first_seen = "2025-10-17"
    condition:
        hash.sha256(0, filesize) == "3e11dfb1ac52e8a170ab4af6b85a43f25cce6299afe8589abd04559b33dabcb9"
}

MassLogger — Malware Profile

MassLogger credential stealer. PT2600000043.js Portekiz fatura lurü. CommonJS obfuscation. dispatch configuration data.

Malware Type
Infostealer
Programming Language
C#/.NET
C2 Protocol
SMTP/FTP
Target Systems
Windows

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 — MassLogger
# SHA256 3e11dfb1ac52e8a170ab4af6b85a43f25cce6299afe8589abd04559b33dabcb9 # MD5 25b85751cc8f7defd3384b978a4bbabb
TypeValueNote
sha256 3e11dfb1ac52e8a170ab4af6b85a43f25cce6299afe8589abd04559b33dabcb9 Sample:MassLogger
md5 25b85751cc8f7defd3384b978a4bbabb Sample:MassLogger
Tags
massloggerinfostealermalwaremediumsha256hash-analizi