MassLogger | Threat Level: medium | Type: Infostealer

Cryptographic Identifiers

SHA2568c9b59561bb5d7286f66749642e2dd63b4200daff8fed69539462d7ff06e59d6
MD5f4351007824c5356d99ae5f8584d5a19
File Typeexe
Size890.0 KB
First Seen2026-05-08
File Name8c9b59561bb5d7286f66749642e2dd63b4200daff8fed69539462d7ff06e59d6
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: 8c9b59561bb5d7286f66749642e2dd63b4200daff8fed69539462d7ff06e59d6
  • MD5: f4351007824c5356d99ae5f8584d5a19

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: 8c9b59561bb5d728"
        threat_level = "medium"
        first_seen = "2026-05-08"
    condition:
        hash.sha256(0, filesize) == "8c9b59561bb5d7286f66749642e2dd63b4200daff8fed69539462d7ff06e59d6"
}

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 8c9b59561bb5d7286f66749642e2dd63b4200daff8fed69539462d7ff06e59d6 # MD5 f4351007824c5356d99ae5f8584d5a19
TypeValueNote
sha256 8c9b59561bb5d7286f66749642e2dd63b4200daff8fed69539462d7ff06e59d6 Sample:MassLogger
md5 f4351007824c5356d99ae5f8584d5a19 Sample:MassLogger
Tags
massloggerinfostealermalwaremediumsha256hash-analizi