MassLogger | Threat Level: medium | Type: Infostealer

Cryptographic Identifiers

SHA256f4929a5a9a358c02ddf5f280719be469b77c8f9c5ff6d07dbfa3fa748d57096d
MD52a481d063c3e2c7ddd3033c2a9641bfd
File Typevbe
Size1273.0 KB
First Seen2025-12-08
File Namemm7884032025pdf.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: f4929a5a9a358c02ddf5f280719be469b77c8f9c5ff6d07dbfa3fa748d57096d
  • MD5: 2a481d063c3e2c7ddd3033c2a9641bfd

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: f4929a5a9a358c02"
        threat_level = "medium"
        first_seen = "2025-12-08"
    condition:
        hash.sha256(0, filesize) == "f4929a5a9a358c02ddf5f280719be469b77c8f9c5ff6d07dbfa3fa748d57096d"
}

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 f4929a5a9a358c02ddf5f280719be469b77c8f9c5ff6d07dbfa3fa748d57096d # MD5 2a481d063c3e2c7ddd3033c2a9641bfd
TypeValueNote
sha256 f4929a5a9a358c02ddf5f280719be469b77c8f9c5ff6d07dbfa3fa748d57096d Sample:MassLogger
md5 2a481d063c3e2c7ddd3033c2a9641bfd Sample:MassLogger
Tags
massloggerinfostealermalwaremediumsha256hash-analizi