MassLogger | Threat Level: medium | Type: Infostealer

Cryptographic Identifiers

SHA2566cae8b824b6b4df9a12f953c4774abf07b33dd3a57b52a62e34bd0bbbfd5e327
MD553c7d5a13a8d367b11b7c22d93c03a93
File Typeexe
Size668.0 KB
First Seen2026-05-20
File NamePS2025-1658_SATIN_ALMA_SİPARİŞ_FORMU_xlsx.exe
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: 6cae8b824b6b4df9a12f953c4774abf07b33dd3a57b52a62e34bd0bbbfd5e327
  • MD5: 53c7d5a13a8d367b11b7c22d93c03a93

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: 6cae8b824b6b4df9"
        threat_level = "medium"
        first_seen = "2026-05-20"
    condition:
        hash.sha256(0, filesize) == "6cae8b824b6b4df9a12f953c4774abf07b33dd3a57b52a62e34bd0bbbfd5e327"
}

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 6cae8b824b6b4df9a12f953c4774abf07b33dd3a57b52a62e34bd0bbbfd5e327 # MD5 53c7d5a13a8d367b11b7c22d93c03a93
TypeValueNote
sha256 6cae8b824b6b4df9a12f953c4774abf07b33dd3a57b52a62e34bd0bbbfd5e327 Sample:MassLogger
md5 53c7d5a13a8d367b11b7c22d93c03a93 Sample:MassLogger
Tags
massloggerinfostealermalwaremediumsha256hash-analizi