MassLogger | Threat Level: medium | Type: Infostealer

Cryptographic Identifiers

SHA256f57955c602d30ead8e0dd7a4465272e051f8f0c63c6e03a1a8ee1faca63bb4c0
MD54cfac17d08b24fb99d01444f2c6522db
File Typevbe
Size967.1 KB
First Seen2025-07-17
File Namelgt55432.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: f57955c602d30ead8e0dd7a4465272e051f8f0c63c6e03a1a8ee1faca63bb4c0
  • MD5: 4cfac17d08b24fb99d01444f2c6522db

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: f57955c602d30ead"
        threat_level = "medium"
        first_seen = "2025-07-17"
    condition:
        hash.sha256(0, filesize) == "f57955c602d30ead8e0dd7a4465272e051f8f0c63c6e03a1a8ee1faca63bb4c0"
}

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 f57955c602d30ead8e0dd7a4465272e051f8f0c63c6e03a1a8ee1faca63bb4c0 # MD5 4cfac17d08b24fb99d01444f2c6522db
TypeValueNote
sha256 f57955c602d30ead8e0dd7a4465272e051f8f0c63c6e03a1a8ee1faca63bb4c0 Sample:MassLogger
md5 4cfac17d08b24fb99d01444f2c6522db Sample:MassLogger
Tags
massloggerinfostealermalwaremediumsha256hash-analizi