MassLogger | Threat Level: medium | Type: Infostealer

Cryptographic Identifiers

SHA2565480921331f564a80a1e4d1811010328bb20e1b8a0dcdd771e928a9874f52cdb
MD5b364b5f9db799aac3b5fe7b5b1c2f7e0
File Typehta
Size2499.8 KB
First Seen2026-05-19
File Namedekont.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: 5480921331f564a80a1e4d1811010328bb20e1b8a0dcdd771e928a9874f52cdb
  • MD5: b364b5f9db799aac3b5fe7b5b1c2f7e0

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: 5480921331f564a8"
        threat_level = "medium"
        first_seen = "2026-05-19"
    condition:
        hash.sha256(0, filesize) == "5480921331f564a80a1e4d1811010328bb20e1b8a0dcdd771e928a9874f52cdb"
}

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 5480921331f564a80a1e4d1811010328bb20e1b8a0dcdd771e928a9874f52cdb # MD5 b364b5f9db799aac3b5fe7b5b1c2f7e0
TypeValueNote
sha256 5480921331f564a80a1e4d1811010328bb20e1b8a0dcdd771e928a9874f52cdb Sample:MassLogger
md5 b364b5f9db799aac3b5fe7b5b1c2f7e0 Sample:MassLogger
Tags
massloggerinfostealermalwaremediumsha256hash-analizi