MassLogger | Threat Level: medium | Type: Infostealer

Cryptographic Identifiers

SHA256553d904e1d73497fc05af9b9fa570cd6ea72043a445b2c358ce27bc84d28d226
MD5a3cd879220e2b392655483f727fb447e
File Typeexe
Size962.5 KB
First Seen2026-02-05
File Name553d904e1d73497fc05af9b9fa570cd6ea72043a445b2c358ce27bc84d28d226
Tagsexe, MassLogger

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: 553d904e1d73497fc05af9b9fa570cd6ea72043a445b2c358ce27bc84d28d226
  • MD5: a3cd879220e2b392655483f727fb447e

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: 553d904e1d73497f"
        threat_level = "medium"
        first_seen = "2026-02-05"
    condition:
        hash.sha256(0, filesize) == "553d904e1d73497fc05af9b9fa570cd6ea72043a445b2c358ce27bc84d28d226"
}

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 553d904e1d73497fc05af9b9fa570cd6ea72043a445b2c358ce27bc84d28d226 # MD5 a3cd879220e2b392655483f727fb447e
TypeValueNote
sha256 553d904e1d73497fc05af9b9fa570cd6ea72043a445b2c358ce27bc84d28d226 Sample:MassLogger
md5 a3cd879220e2b392655483f727fb447e Sample:MassLogger
Tags
massloggerinfostealermalwaremediumsha256hash-analizi