MassLogger | Threat Level: medium | Type: Infostealer

Cryptographic Identifiers

SHA2566d44c9589bdecf7b154afc5872f4f4b85d437dd8b182c670f1a368fc5f9b44c3
MD54b8e582852587574142eb5e5c763c7d5
File Typejs
Size2416.4 KB
First Seen2026-06-10
File NameJWSK-6I1M1S1R3A2.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: 6d44c9589bdecf7b154afc5872f4f4b85d437dd8b182c670f1a368fc5f9b44c3
  • MD5: 4b8e582852587574142eb5e5c763c7d5

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: 6d44c9589bdecf7b"
        threat_level = "medium"
        first_seen = "2026-06-10"
    condition:
        hash.sha256(0, filesize) == "6d44c9589bdecf7b154afc5872f4f4b85d437dd8b182c670f1a368fc5f9b44c3"
}

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 6d44c9589bdecf7b154afc5872f4f4b85d437dd8b182c670f1a368fc5f9b44c3 # MD5 4b8e582852587574142eb5e5c763c7d5
TypeValueNote
sha256 6d44c9589bdecf7b154afc5872f4f4b85d437dd8b182c670f1a368fc5f9b44c3 Sample:MassLogger
md5 4b8e582852587574142eb5e5c763c7d5 Sample:MassLogger
Tags
massloggerinfostealermalwaremediumsha256hash-analizi