MassLogger | Threat Level: medium | Type: Infostealer

Cryptographic Identifiers

SHA25656bef38fa3109c9aa68ab3a85062ce0ea062130e95216f3285664fdb3d17771e
MD5f0b98ba3f6652485deae543032ee81be
File Typeexe
Size709.0 KB
First Seen2025-09-30
File NameSecuriteInfo.com.Win32.MalwareX-gen.16153687
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: 56bef38fa3109c9aa68ab3a85062ce0ea062130e95216f3285664fdb3d17771e
  • MD5: f0b98ba3f6652485deae543032ee81be

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: 56bef38fa3109c9a"
        threat_level = "medium"
        first_seen = "2025-09-30"
    condition:
        hash.sha256(0, filesize) == "56bef38fa3109c9aa68ab3a85062ce0ea062130e95216f3285664fdb3d17771e"
}

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 56bef38fa3109c9aa68ab3a85062ce0ea062130e95216f3285664fdb3d17771e # MD5 f0b98ba3f6652485deae543032ee81be
TypeValueNote
sha256 56bef38fa3109c9aa68ab3a85062ce0ea062130e95216f3285664fdb3d17771e Sample:MassLogger
md5 f0b98ba3f6652485deae543032ee81be Sample:MassLogger
Tags
massloggerinfostealermalwaremediumsha256hash-analizi