MassLogger | Threat Level: medium | Type: Infostealer

Cryptographic Identifiers

SHA256018fe5bd0c2101c546959da962776443c83e5ed6f7c9d5aaf621ddde3e985904
MD5e448fbf4aacc62cdd17ce0dfe9a28b43
File Typejs
Size769.9 KB
First Seen2026-06-10
File NameRecibos de pago_2958_2026_06_10.pdf.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: 018fe5bd0c2101c546959da962776443c83e5ed6f7c9d5aaf621ddde3e985904
  • MD5: e448fbf4aacc62cdd17ce0dfe9a28b43

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: 018fe5bd0c2101c5"
        threat_level = "medium"
        first_seen = "2026-06-10"
    condition:
        hash.sha256(0, filesize) == "018fe5bd0c2101c546959da962776443c83e5ed6f7c9d5aaf621ddde3e985904"
}

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 018fe5bd0c2101c546959da962776443c83e5ed6f7c9d5aaf621ddde3e985904 # MD5 e448fbf4aacc62cdd17ce0dfe9a28b43
TypeValueNote
sha256 018fe5bd0c2101c546959da962776443c83e5ed6f7c9d5aaf621ddde3e985904 Sample:MassLogger
md5 e448fbf4aacc62cdd17ce0dfe9a28b43 Sample:MassLogger
Tags
massloggerinfostealermalwaremediumsha256hash-analizi