MassLogger | Threat Level: medium | Type: Infostealer

Cryptographic Identifiers

SHA256d5e9e5b91a6ed76c8cff1091e6fc0a46750d39cb1c49716b84e7a9e4b29b9d2e
MD5eaa34ad9521cf35142f72cfdf2d78368
File Typejs
Size1498.7 KB
First Seen2026-03-05
File Nameeaa34ad9521cf35142f72cfdf2d78368.js
Tagsjs, MassLogger

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: d5e9e5b91a6ed76c8cff1091e6fc0a46750d39cb1c49716b84e7a9e4b29b9d2e
  • MD5: eaa34ad9521cf35142f72cfdf2d78368

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: d5e9e5b91a6ed76c"
        threat_level = "medium"
        first_seen = "2026-03-05"
    condition:
        hash.sha256(0, filesize) == "d5e9e5b91a6ed76c8cff1091e6fc0a46750d39cb1c49716b84e7a9e4b29b9d2e"
}

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 d5e9e5b91a6ed76c8cff1091e6fc0a46750d39cb1c49716b84e7a9e4b29b9d2e # MD5 eaa34ad9521cf35142f72cfdf2d78368
TypeValueNote
sha256 d5e9e5b91a6ed76c8cff1091e6fc0a46750d39cb1c49716b84e7a9e4b29b9d2e Sample:MassLogger
md5 eaa34ad9521cf35142f72cfdf2d78368 Sample:MassLogger
Tags
massloggerinfostealermalwaremediumsha256hash-analizi