MassLogger | Threat Level: medium | Type: Infostealer

Cryptographic Identifiers

SHA2565eaebb9663d8aced3941d1f105ea2704a159ac0c40e49902762231697697f75e
MD550d0bcc7f0587b22c013bbaa3c49431e
File Typejs
Size1.5 KB
First Seen2025-10-02
File NameQuotation Request – RFQ-4008754233007.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: 5eaebb9663d8aced3941d1f105ea2704a159ac0c40e49902762231697697f75e
  • MD5: 50d0bcc7f0587b22c013bbaa3c49431e

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: 5eaebb9663d8aced"
        threat_level = "medium"
        first_seen = "2025-10-02"
    condition:
        hash.sha256(0, filesize) == "5eaebb9663d8aced3941d1f105ea2704a159ac0c40e49902762231697697f75e"
}

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 5eaebb9663d8aced3941d1f105ea2704a159ac0c40e49902762231697697f75e # MD5 50d0bcc7f0587b22c013bbaa3c49431e
TypeValueNote
sha256 5eaebb9663d8aced3941d1f105ea2704a159ac0c40e49902762231697697f75e Sample:MassLogger
md5 50d0bcc7f0587b22c013bbaa3c49431e Sample:MassLogger
Tags
massloggerinfostealermalwaremediumsha256hash-analizi