MassLogger | Threat Level: medium | Type: Infostealer

Cryptographic Identifiers

SHA2564af56b9bfd7f7de86cc0b3b6a910c2ffb331f6c76e32104041c554c00409d296
MD5f665283962b63ad448b9ea160cceecb6
File Typeexe
Size741.5 KB
First Seen2025-09-25
File NameSecuriteInfo.com.Win32.MalwareX-gen.25273936
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: 4af56b9bfd7f7de86cc0b3b6a910c2ffb331f6c76e32104041c554c00409d296
  • MD5: f665283962b63ad448b9ea160cceecb6

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: 4af56b9bfd7f7de8"
        threat_level = "medium"
        first_seen = "2025-09-25"
    condition:
        hash.sha256(0, filesize) == "4af56b9bfd7f7de86cc0b3b6a910c2ffb331f6c76e32104041c554c00409d296"
}

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 4af56b9bfd7f7de86cc0b3b6a910c2ffb331f6c76e32104041c554c00409d296 # MD5 f665283962b63ad448b9ea160cceecb6
TypeValueNote
sha256 4af56b9bfd7f7de86cc0b3b6a910c2ffb331f6c76e32104041c554c00409d296 Sample:MassLogger
md5 f665283962b63ad448b9ea160cceecb6 Sample:MassLogger
Tags
massloggerinfostealermalwaremediumsha256hash-analizi