MassLogger | Threat Level: medium | Type: Infostealer

Cryptographic Identifiers

SHA2569fa0a88635b1c1d31ccf0fa03f7616ee716e8b5d26ff55064bf894212d5e10f1
MD599f65aa09ab3d320c4f0b8f4f79cc684
File Typehta
Size394.4 KB
First Seen2026-06-30
File NameQUOTE-05348-2026.pdf.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: 9fa0a88635b1c1d31ccf0fa03f7616ee716e8b5d26ff55064bf894212d5e10f1
  • MD5: 99f65aa09ab3d320c4f0b8f4f79cc684

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: 9fa0a88635b1c1d3"
        threat_level = "medium"
        first_seen = "2026-06-30"
    condition:
        hash.sha256(0, filesize) == "9fa0a88635b1c1d31ccf0fa03f7616ee716e8b5d26ff55064bf894212d5e10f1"
}

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 9fa0a88635b1c1d31ccf0fa03f7616ee716e8b5d26ff55064bf894212d5e10f1 # MD5 99f65aa09ab3d320c4f0b8f4f79cc684
TypeValueNote
sha256 9fa0a88635b1c1d31ccf0fa03f7616ee716e8b5d26ff55064bf894212d5e10f1 Sample:MassLogger
md5 99f65aa09ab3d320c4f0b8f4f79cc684 Sample:MassLogger
Tags
massloggerinfostealermalwaremediumsha256hash-analizi