MassLogger | Threat Level: medium | Type: Infostealer

Cryptographic Identifiers

SHA256b4534c889950a2997bd0a2916da7031119382bb8c9112f11bbfcfa843789c7b4
MD5f452a39e116255b0dd8bb41b216d51ae
File Typevbe
Size540.1 KB
First Seen2025-10-03
File NameEKSTRE N° 011025.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: b4534c889950a2997bd0a2916da7031119382bb8c9112f11bbfcfa843789c7b4
  • MD5: f452a39e116255b0dd8bb41b216d51ae

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: b4534c889950a299"
        threat_level = "medium"
        first_seen = "2025-10-03"
    condition:
        hash.sha256(0, filesize) == "b4534c889950a2997bd0a2916da7031119382bb8c9112f11bbfcfa843789c7b4"
}

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 b4534c889950a2997bd0a2916da7031119382bb8c9112f11bbfcfa843789c7b4 # MD5 f452a39e116255b0dd8bb41b216d51ae
TypeValueNote
sha256 b4534c889950a2997bd0a2916da7031119382bb8c9112f11bbfcfa843789c7b4 Sample:MassLogger
md5 f452a39e116255b0dd8bb41b216d51ae Sample:MassLogger
Tags
massloggerinfostealermalwaremediumsha256hash-analizi