MassLogger | Threat Level: medium | Type: Infostealer

Cryptographic Identifiers

SHA2566cd900620e1ca921c028ad02e78e082d90351ec2a96c34ac532249f5fea16c3a
MD52be1d5da11c637acc2385451a8de7697
File Typejs
Size3974.6 KB
First Seen2026-06-16
File NameRFQ-3L50051061.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: 6cd900620e1ca921c028ad02e78e082d90351ec2a96c34ac532249f5fea16c3a
  • MD5: 2be1d5da11c637acc2385451a8de7697

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: 6cd900620e1ca921"
        threat_level = "medium"
        first_seen = "2026-06-16"
    condition:
        hash.sha256(0, filesize) == "6cd900620e1ca921c028ad02e78e082d90351ec2a96c34ac532249f5fea16c3a"
}

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 6cd900620e1ca921c028ad02e78e082d90351ec2a96c34ac532249f5fea16c3a # MD5 2be1d5da11c637acc2385451a8de7697
TypeValueNote
sha256 6cd900620e1ca921c028ad02e78e082d90351ec2a96c34ac532249f5fea16c3a Sample:MassLogger
md5 2be1d5da11c637acc2385451a8de7697 Sample:MassLogger
Tags
massloggerinfostealermalwaremediumsha256hash-analizi