MassLogger | Threat Level: medium | Type: Infostealer

Cryptographic Identifiers

SHA256dcd3ac2042e9b2122791a11679b8d4bb6170286b2b5101655ad157cb6c7c8077
MD52e51860c77cc0912431c58d98f976af7
File Typejs
Size2417.1 KB
First Seen2026-05-26
File NamePAYMENT SWIFT MT103-20262205.js
Tagsexe, js, 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: dcd3ac2042e9b2122791a11679b8d4bb6170286b2b5101655ad157cb6c7c8077
  • MD5: 2e51860c77cc0912431c58d98f976af7

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: dcd3ac2042e9b212"
        threat_level = "medium"
        first_seen = "2026-05-26"
    condition:
        hash.sha256(0, filesize) == "dcd3ac2042e9b2122791a11679b8d4bb6170286b2b5101655ad157cb6c7c8077"
}

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 dcd3ac2042e9b2122791a11679b8d4bb6170286b2b5101655ad157cb6c7c8077 # MD5 2e51860c77cc0912431c58d98f976af7
TypeValueNote
sha256 dcd3ac2042e9b2122791a11679b8d4bb6170286b2b5101655ad157cb6c7c8077 Sample:MassLogger
md5 2e51860c77cc0912431c58d98f976af7 Sample:MassLogger
Tags
massloggerinfostealermalwaremediumsha256hash-analizi