MassLogger | Threat Level: medium | Type: Infostealer

Cryptographic Identifiers

SHA256574a4e7a5f2cc7b755da86c4233e08c05f244c722deba53df766bcd96cfd1311
MD5a5fdc0e4f4004a5b8c20191c7c3ebcad
File Typeexe
Size990.5 KB
First Seen2026-06-08
File Name574a4e7a5f2cc7b755da86c4233e08c05f244c722deba53df766bcd96cfd1311
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: 574a4e7a5f2cc7b755da86c4233e08c05f244c722deba53df766bcd96cfd1311
  • MD5: a5fdc0e4f4004a5b8c20191c7c3ebcad

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: 574a4e7a5f2cc7b7"
        threat_level = "medium"
        first_seen = "2026-06-08"
    condition:
        hash.sha256(0, filesize) == "574a4e7a5f2cc7b755da86c4233e08c05f244c722deba53df766bcd96cfd1311"
}

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 574a4e7a5f2cc7b755da86c4233e08c05f244c722deba53df766bcd96cfd1311 # MD5 a5fdc0e4f4004a5b8c20191c7c3ebcad
TypeValueNote
sha256 574a4e7a5f2cc7b755da86c4233e08c05f244c722deba53df766bcd96cfd1311 Sample:MassLogger
md5 a5fdc0e4f4004a5b8c20191c7c3ebcad Sample:MassLogger
Tags
massloggerinfostealermalwaremediumsha256hash-analizi