MassLogger | Threat Level: medium | Type: Infostealer

Cryptographic Identifiers

SHA25628b4e1d755006bccacf9e9be573992261e7141688723e0460399b4ae301dde7a
MD5445ca2305e6a8dce44c5a30d685ec15e
File Typezip
Size154.7 KB
First Seen2026-05-20
File Namepurchase_order.zip
TagsMassLogger, zip

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: 28b4e1d755006bccacf9e9be573992261e7141688723e0460399b4ae301dde7a
  • MD5: 445ca2305e6a8dce44c5a30d685ec15e

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: 28b4e1d755006bcc"
        threat_level = "medium"
        first_seen = "2026-05-20"
    condition:
        hash.sha256(0, filesize) == "28b4e1d755006bccacf9e9be573992261e7141688723e0460399b4ae301dde7a"
}

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 28b4e1d755006bccacf9e9be573992261e7141688723e0460399b4ae301dde7a # MD5 445ca2305e6a8dce44c5a30d685ec15e
TypeValueNote
sha256 28b4e1d755006bccacf9e9be573992261e7141688723e0460399b4ae301dde7a Sample:MassLogger
md5 445ca2305e6a8dce44c5a30d685ec15e Sample:MassLogger
Tags
massloggerinfostealermalwaremediumsha256hash-analizi