MassLogger | Threat Level: medium | Type: Infostealer

Cryptographic Identifiers

SHA2564aa6fcbdb27fa339778b21001b804ba7f3bb20951e8c17126961fd6b9ebef659
MD5f96d9c31eea0e5e8f607cbb2d2206072
File Typeexe
Size862.0 KB
First Seen2026-03-16
File NameSecuriteInfo.com.Win32.MalwareX-gen.64374996
Tagsexe, MassLogger

Malware Family: MassLogger

MassLogger, email tabanlı keylogger'dır.

TypeInfostealer
Programming LanguageC#/.NET
Target PlatformWindows
C2 ProtocolSMTP/FTP
PurposeEmail keylogger
First Seen Year2020

Threat Indicators (IOC)

  • SHA256: 4aa6fcbdb27fa339778b21001b804ba7f3bb20951e8c17126961fd6b9ebef659
  • MD5: f96d9c31eea0e5e8f607cbb2d2206072

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: 4aa6fcbdb27fa339"
        threat_level = "medium"
        first_seen = "2026-03-16"
    condition:
        hash.sha256(0, filesize) == "4aa6fcbdb27fa339778b21001b804ba7f3bb20951e8c17126961fd6b9ebef659"
}

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 4aa6fcbdb27fa339778b21001b804ba7f3bb20951e8c17126961fd6b9ebef659 # MD5 f96d9c31eea0e5e8f607cbb2d2206072
TypeValueNote
sha256 4aa6fcbdb27fa339778b21001b804ba7f3bb20951e8c17126961fd6b9ebef659 Sample:MassLogger
md5 f96d9c31eea0e5e8f607cbb2d2206072 Sample:MassLogger
Tags
massloggerinfostealermalwaremediumsha256hash-analizi