MassLogger | Threat Level: medium | Type: Infostealer

Cryptographic Identifiers

SHA25683078f80eadc889586ae154f90cc443bdb0ec5eeea21916b730e60742d9ed1fc
MD50bfa300c32ed026cb126f672bb95f929
File Typejs
Size219.5 KB
First Seen2025-06-12
File Name0(5).js
Tagsjs, MassLogger, paste-ee

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: 83078f80eadc889586ae154f90cc443bdb0ec5eeea21916b730e60742d9ed1fc
  • MD5: 0bfa300c32ed026cb126f672bb95f929

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: 83078f80eadc8895"
        threat_level = "medium"
        first_seen = "2025-06-12"
    condition:
        hash.sha256(0, filesize) == "83078f80eadc889586ae154f90cc443bdb0ec5eeea21916b730e60742d9ed1fc"
}

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 83078f80eadc889586ae154f90cc443bdb0ec5eeea21916b730e60742d9ed1fc # MD5 0bfa300c32ed026cb126f672bb95f929
TypeValueNote
sha256 83078f80eadc889586ae154f90cc443bdb0ec5eeea21916b730e60742d9ed1fc Sample:MassLogger
md5 0bfa300c32ed026cb126f672bb95f929 Sample:MassLogger
Tags
massloggerinfostealermalwaremediumsha256hash-analizi