MassLogger | Threat Level: medium | Type: Infostealer

Cryptographic Identifiers

SHA2566d5f54e3d4cc2f29b7efb29994828bf0ddf7b91ee44c17134f72947263c43f77
MD5f393d5d2a6d45c1fa83e176fc4ced2c6
File Typeexe
Size984.0 KB
First Seen2025-07-17
File Namee-dekont_html.exe
Tagsexe, geo, MassLogger, TUR

Malware Family: MassLogger

MassLogger, email keylogger'dır.

TypeInfostealer
Programming LanguageC#/.NET
Target PlatformWindows
C2 ProtocolSMTP/FTP
PurposeEmail keylogger
First Seen Year2020

Threat Indicators (IOC)

  • SHA256: 6d5f54e3d4cc2f29b7efb29994828bf0ddf7b91ee44c17134f72947263c43f77
  • MD5: f393d5d2a6d45c1fa83e176fc4ced2c6

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: 6d5f54e3d4cc2f29"
        threat_level = "medium"
        first_seen = "2025-07-17"
    condition:
        hash.sha256(0, filesize) == "6d5f54e3d4cc2f29b7efb29994828bf0ddf7b91ee44c17134f72947263c43f77"
}

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 6d5f54e3d4cc2f29b7efb29994828bf0ddf7b91ee44c17134f72947263c43f77 # MD5 f393d5d2a6d45c1fa83e176fc4ced2c6
TypeValueNote
sha256 6d5f54e3d4cc2f29b7efb29994828bf0ddf7b91ee44c17134f72947263c43f77 Sample:MassLogger
md5 f393d5d2a6d45c1fa83e176fc4ced2c6 Sample:MassLogger
Tags
massloggerinfostealermalwaremediumsha256hash-analizi