MassLogger | Threat Level: medium | Type: Infostealer

Cryptographic Identifiers

SHA2568bb31c9cf73c5c10d584961fbd2c4cf8c5707eeaed410e29a7fbb32f8726adfe
MD546a907e9c9378c16759fe44cdb8998c3
File Typejs
Size1501.0 KB
First Seen2026-03-12
File Name46a907e9c9378c16759fe44cdb8998c3.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: 8bb31c9cf73c5c10d584961fbd2c4cf8c5707eeaed410e29a7fbb32f8726adfe
  • MD5: 46a907e9c9378c16759fe44cdb8998c3

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: 8bb31c9cf73c5c10"
        threat_level = "medium"
        first_seen = "2026-03-12"
    condition:
        hash.sha256(0, filesize) == "8bb31c9cf73c5c10d584961fbd2c4cf8c5707eeaed410e29a7fbb32f8726adfe"
}

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 8bb31c9cf73c5c10d584961fbd2c4cf8c5707eeaed410e29a7fbb32f8726adfe # MD5 46a907e9c9378c16759fe44cdb8998c3
TypeValueNote
sha256 8bb31c9cf73c5c10d584961fbd2c4cf8c5707eeaed410e29a7fbb32f8726adfe Sample:MassLogger
md5 46a907e9c9378c16759fe44cdb8998c3 Sample:MassLogger
Tags
massloggerinfostealermalwaremediumsha256hash-analizi