MassLogger | Threat Level: medium | Type: Infostealer

Cryptographic Identifiers

SHA256b609a59e93a5eb963b2308d9d7d88770dd386c2e3c8e11fb11203321203fccdd
MD5c91e0eddfafa8d62670ee9607fc7ccc3
File Typehta
Size2470.3 KB
First Seen2026-05-19
File NameSAS -1126055.hta
Tagshta, 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: b609a59e93a5eb963b2308d9d7d88770dd386c2e3c8e11fb11203321203fccdd
  • MD5: c91e0eddfafa8d62670ee9607fc7ccc3

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: b609a59e93a5eb96"
        threat_level = "medium"
        first_seen = "2026-05-19"
    condition:
        hash.sha256(0, filesize) == "b609a59e93a5eb963b2308d9d7d88770dd386c2e3c8e11fb11203321203fccdd"
}

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 b609a59e93a5eb963b2308d9d7d88770dd386c2e3c8e11fb11203321203fccdd # MD5 c91e0eddfafa8d62670ee9607fc7ccc3
TypeValueNote
sha256 b609a59e93a5eb963b2308d9d7d88770dd386c2e3c8e11fb11203321203fccdd Sample:MassLogger
md5 c91e0eddfafa8d62670ee9607fc7ccc3 Sample:MassLogger
Tags
massloggerinfostealermalwaremediumsha256hash-analizi