MassLogger | Threat Level: medium | Type: Infostealer

Cryptographic Identifiers

SHA256d46843479cda8643d472722e93d81c268b38f743ba8874e9e3d52aa837ad35eb
MD591b5344dfc13378633bb8a37183368a8
File Typeexe
Size657.0 KB
First Seen2025-10-09
File NameMT103 -PL94970 08102025.exe
Tagsexe, MassLogger, payment

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: d46843479cda8643d472722e93d81c268b38f743ba8874e9e3d52aa837ad35eb
  • MD5: 91b5344dfc13378633bb8a37183368a8

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: d46843479cda8643"
        threat_level = "medium"
        first_seen = "2025-10-09"
    condition:
        hash.sha256(0, filesize) == "d46843479cda8643d472722e93d81c268b38f743ba8874e9e3d52aa837ad35eb"
}

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 d46843479cda8643d472722e93d81c268b38f743ba8874e9e3d52aa837ad35eb # MD5 91b5344dfc13378633bb8a37183368a8
TypeValueNote
sha256 d46843479cda8643d472722e93d81c268b38f743ba8874e9e3d52aa837ad35eb Sample:MassLogger
md5 91b5344dfc13378633bb8a37183368a8 Sample:MassLogger
Tags
massloggerinfostealermalwaremediumsha256hash-analizi