MassLogger | Threat Level: medium | Type: Infostealer

Cryptographic Identifiers

SHA2569c23c66da1a8b96e48e659ec201207371a8040cba232bb5dd42f88b99513536e
MD508dbe7d0039b0c112ea22edb4eb4e64e
File Typejs
Size447.0 KB
First Seen2026-03-18
File Name08dbe7d0039b0c112ea22edb4eb4e64e.js
Tagsgeo, js, MassLogger, TUR

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: 9c23c66da1a8b96e48e659ec201207371a8040cba232bb5dd42f88b99513536e
  • MD5: 08dbe7d0039b0c112ea22edb4eb4e64e

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: 9c23c66da1a8b96e"
        threat_level = "medium"
        first_seen = "2026-03-18"
    condition:
        hash.sha256(0, filesize) == "9c23c66da1a8b96e48e659ec201207371a8040cba232bb5dd42f88b99513536e"
}

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 9c23c66da1a8b96e48e659ec201207371a8040cba232bb5dd42f88b99513536e # MD5 08dbe7d0039b0c112ea22edb4eb4e64e
TypeValueNote
sha256 9c23c66da1a8b96e48e659ec201207371a8040cba232bb5dd42f88b99513536e Sample:MassLogger
md5 08dbe7d0039b0c112ea22edb4eb4e64e Sample:MassLogger
Tags
massloggerinfostealermalwaremediumsha256hash-analizi