MassLogger | Threat Level: medium | Type: Infostealer

Cryptographic Identifiers

SHA256f9c86d1815b169a952352073adc608b0e215e9bfb871cd85e59a76d1152aff14
MD54cae37ba69b872585f14e1c9800ee938
File Typeexe
Size520.5 KB
First Seen2025-09-05
File Namef9c86d1815b169a952352073adc608b0e215e9bfb871cd85e59a76d1152aff14
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: f9c86d1815b169a952352073adc608b0e215e9bfb871cd85e59a76d1152aff14
  • MD5: 4cae37ba69b872585f14e1c9800ee938

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: f9c86d1815b169a9"
        threat_level = "medium"
        first_seen = "2025-09-05"
    condition:
        hash.sha256(0, filesize) == "f9c86d1815b169a952352073adc608b0e215e9bfb871cd85e59a76d1152aff14"
}

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 f9c86d1815b169a952352073adc608b0e215e9bfb871cd85e59a76d1152aff14 # MD5 4cae37ba69b872585f14e1c9800ee938
TypeValueNote
sha256 f9c86d1815b169a952352073adc608b0e215e9bfb871cd85e59a76d1152aff14 Sample:MassLogger
md5 4cae37ba69b872585f14e1c9800ee938 Sample:MassLogger
Tags
massloggerinfostealermalwaremediumsha256hash-analizi