MassLogger | Threat Level: medium | Type: Infostealer

Cryptographic Identifiers

SHA256fcce017a40b3e39526c19007cdfefcd80f1cb4498abddbb552a3eed9ed37832c
MD59634a174774465ac76035bb7c26d567b
File Typeexe
Size692.0 KB
First Seen2025-10-02
File NameSecuriteInfo.com.Win32.MalwareX-gen.33778869
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: fcce017a40b3e39526c19007cdfefcd80f1cb4498abddbb552a3eed9ed37832c
  • MD5: 9634a174774465ac76035bb7c26d567b

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: fcce017a40b3e395"
        threat_level = "medium"
        first_seen = "2025-10-02"
    condition:
        hash.sha256(0, filesize) == "fcce017a40b3e39526c19007cdfefcd80f1cb4498abddbb552a3eed9ed37832c"
}

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 fcce017a40b3e39526c19007cdfefcd80f1cb4498abddbb552a3eed9ed37832c # MD5 9634a174774465ac76035bb7c26d567b
TypeValueNote
sha256 fcce017a40b3e39526c19007cdfefcd80f1cb4498abddbb552a3eed9ed37832c Sample:MassLogger
md5 9634a174774465ac76035bb7c26d567b Sample:MassLogger
Tags
massloggerinfostealermalwaremediumsha256hash-analizi