MassLogger | Threat Level: medium | Type: Infostealer

Cryptographic Identifiers

SHA256af0ffebfba8d9ae9d2845f680d766590d4170ffe7dc3bbf355072fef2d1028bb
MD5bc23ed4c49d6ed989bfef9908b27e297
File Typevbe
Size1273.0 KB
First Seen2025-12-08
File Namell5673.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: af0ffebfba8d9ae9d2845f680d766590d4170ffe7dc3bbf355072fef2d1028bb
  • MD5: bc23ed4c49d6ed989bfef9908b27e297

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: af0ffebfba8d9ae9"
        threat_level = "medium"
        first_seen = "2025-12-08"
    condition:
        hash.sha256(0, filesize) == "af0ffebfba8d9ae9d2845f680d766590d4170ffe7dc3bbf355072fef2d1028bb"
}

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 af0ffebfba8d9ae9d2845f680d766590d4170ffe7dc3bbf355072fef2d1028bb # MD5 bc23ed4c49d6ed989bfef9908b27e297
TypeValueNote
sha256 af0ffebfba8d9ae9d2845f680d766590d4170ffe7dc3bbf355072fef2d1028bb Sample:MassLogger
md5 bc23ed4c49d6ed989bfef9908b27e297 Sample:MassLogger
Tags
massloggerinfostealermalwaremediumsha256hash-analizi