MassLogger | Threat Level: medium | Type: Infostealer

Cryptographic Identifiers

SHA256044b196f8e02011e2768daeed9d5a69e6e9de46a46121ad75ed76cfa5de18fbe
MD5f8433b7ab4c281d17377c11f2186f18a
File Typejs
Size1549.2 KB
First Seen2026-03-18
File Namef8433b7ab4c281d17377c11f2186f18a.js
Tagsjs, 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: 044b196f8e02011e2768daeed9d5a69e6e9de46a46121ad75ed76cfa5de18fbe
  • MD5: f8433b7ab4c281d17377c11f2186f18a

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: 044b196f8e02011e"
        threat_level = "medium"
        first_seen = "2026-03-18"
    condition:
        hash.sha256(0, filesize) == "044b196f8e02011e2768daeed9d5a69e6e9de46a46121ad75ed76cfa5de18fbe"
}

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 044b196f8e02011e2768daeed9d5a69e6e9de46a46121ad75ed76cfa5de18fbe # MD5 f8433b7ab4c281d17377c11f2186f18a
TypeValueNote
sha256 044b196f8e02011e2768daeed9d5a69e6e9de46a46121ad75ed76cfa5de18fbe Sample:MassLogger
md5 f8433b7ab4c281d17377c11f2186f18a Sample:MassLogger
Tags
massloggerinfostealermalwaremediumsha256hash-analizi