MassLogger | Threat Level: medium | Type: Infostealer

Cryptographic Identifiers

SHA2564ee64c11962f9722cfb4beecff8d0ef89b0d158f6a2d5cc150ac742091149e56
MD5620590beb3156635c919ea599925d187
File Typevbe
Size1273.0 KB
First Seen2025-12-04
File Namee-dekont.vbe
TagsMassLogger, vbe

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: 4ee64c11962f9722cfb4beecff8d0ef89b0d158f6a2d5cc150ac742091149e56
  • MD5: 620590beb3156635c919ea599925d187

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: 4ee64c11962f9722"
        threat_level = "medium"
        first_seen = "2025-12-04"
    condition:
        hash.sha256(0, filesize) == "4ee64c11962f9722cfb4beecff8d0ef89b0d158f6a2d5cc150ac742091149e56"
}

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 4ee64c11962f9722cfb4beecff8d0ef89b0d158f6a2d5cc150ac742091149e56 # MD5 620590beb3156635c919ea599925d187
TypeValueNote
sha256 4ee64c11962f9722cfb4beecff8d0ef89b0d158f6a2d5cc150ac742091149e56 Sample:MassLogger
md5 620590beb3156635c919ea599925d187 Sample:MassLogger
Tags
massloggerinfostealermalwaremediumsha256hash-analizi