MassLogger | Threat Level: medium | Type: Infostealer

Cryptographic Identifiers

SHA256734f02a83984fa7a8d735c3fcaffd7cf4faf4af94438d198e036ba2fab77bfc9
MD58e32bfb76fdee96c807175d557e08b54
File Typeexe
Size720.5 KB
First Seen2025-08-07
File NameSecuriteInfo.com.Win32.MalwareX-gen.35529426
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: 734f02a83984fa7a8d735c3fcaffd7cf4faf4af94438d198e036ba2fab77bfc9
  • MD5: 8e32bfb76fdee96c807175d557e08b54

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: 734f02a83984fa7a"
        threat_level = "medium"
        first_seen = "2025-08-07"
    condition:
        hash.sha256(0, filesize) == "734f02a83984fa7a8d735c3fcaffd7cf4faf4af94438d198e036ba2fab77bfc9"
}

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 734f02a83984fa7a8d735c3fcaffd7cf4faf4af94438d198e036ba2fab77bfc9 # MD5 8e32bfb76fdee96c807175d557e08b54
TypeValueNote
sha256 734f02a83984fa7a8d735c3fcaffd7cf4faf4af94438d198e036ba2fab77bfc9 Sample:MassLogger
md5 8e32bfb76fdee96c807175d557e08b54 Sample:MassLogger
Tags
massloggerinfostealermalwaremediumsha256hash-analizi