MassLogger | Threat Level: medium | Type: Infostealer

Cryptographic Identifiers

SHA2565bd50c3755722f918cc51ebe1eca868ce7941a694e8c376d6e516bb5a3dd07ec
MD584afe81bed9bb9f28e9a8a92c21f451f
File Typez
Size17559.4 KB
First Seen2026-05-20
File NameAA-Hesap-hareketlerin.PDF.Z
TagsMassLogger, z

Malware Family: MassLogger

MassLogger, email tabanlı keylogger'dır.

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

Threat Indicators (IOC)

  • SHA256: 5bd50c3755722f918cc51ebe1eca868ce7941a694e8c376d6e516bb5a3dd07ec
  • MD5: 84afe81bed9bb9f28e9a8a92c21f451f

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: 5bd50c3755722f91"
        threat_level = "medium"
        first_seen = "2026-05-20"
    condition:
        hash.sha256(0, filesize) == "5bd50c3755722f918cc51ebe1eca868ce7941a694e8c376d6e516bb5a3dd07ec"
}

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 5bd50c3755722f918cc51ebe1eca868ce7941a694e8c376d6e516bb5a3dd07ec # MD5 84afe81bed9bb9f28e9a8a92c21f451f
TypeValueNote
sha256 5bd50c3755722f918cc51ebe1eca868ce7941a694e8c376d6e516bb5a3dd07ec Sample:MassLogger
md5 84afe81bed9bb9f28e9a8a92c21f451f Sample:MassLogger
Tags
massloggerinfostealermalwaremediumsha256hash-analizi