MassLogger | Threat Level: medium | Type: Infostealer

Cryptographic Identifiers

SHA256b44919b1f152b7bc2e2629abc664cce2ee7abc297ca3e5faababa4dfae6f9f49
MD517756f152d77af6985be797950c3d947
File Typejs
Size762.9 KB
First Seen2026-06-11
File NameRFQ- PR 115322 NBP SQD700 INV.973G.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: b44919b1f152b7bc2e2629abc664cce2ee7abc297ca3e5faababa4dfae6f9f49
  • MD5: 17756f152d77af6985be797950c3d947

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: b44919b1f152b7bc"
        threat_level = "medium"
        first_seen = "2026-06-11"
    condition:
        hash.sha256(0, filesize) == "b44919b1f152b7bc2e2629abc664cce2ee7abc297ca3e5faababa4dfae6f9f49"
}

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 b44919b1f152b7bc2e2629abc664cce2ee7abc297ca3e5faababa4dfae6f9f49 # MD5 17756f152d77af6985be797950c3d947
TypeValueNote
sha256 b44919b1f152b7bc2e2629abc664cce2ee7abc297ca3e5faababa4dfae6f9f49 Sample:MassLogger
md5 17756f152d77af6985be797950c3d947 Sample:MassLogger
Tags
massloggerinfostealermalwaremediumsha256hash-analizi