MassLogger | Threat Level: medium | Type: Infostealer

Cryptographic Identifiers

SHA25642e2a840200283af684299deb504bab35be5afa64caeabe492c896abce095b9f
MD53b5b96aca9ca3194969bab0f54eec546
File Typeexe
Size515.0 KB
First Seen2025-07-26
File Name1C25TNT_00001005.pdf.exe
Tagsexe, MassLogger, TNT

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: 42e2a840200283af684299deb504bab35be5afa64caeabe492c896abce095b9f
  • MD5: 3b5b96aca9ca3194969bab0f54eec546

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: 42e2a840200283af"
        threat_level = "medium"
        first_seen = "2025-07-26"
    condition:
        hash.sha256(0, filesize) == "42e2a840200283af684299deb504bab35be5afa64caeabe492c896abce095b9f"
}

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 42e2a840200283af684299deb504bab35be5afa64caeabe492c896abce095b9f # MD5 3b5b96aca9ca3194969bab0f54eec546
TypeValueNote
sha256 42e2a840200283af684299deb504bab35be5afa64caeabe492c896abce095b9f Sample:MassLogger
md5 3b5b96aca9ca3194969bab0f54eec546 Sample:MassLogger
Tags
massloggerinfostealermalwaremediumsha256hash-analizi