MassLogger | Threat Level: medium | Type: Infostealer

Cryptographic Identifiers

SHA256044dc826726f29137f5e182bc45642240c10cf3c6defa8eae57c34e8c56a435e
MD5dfadb79328c152a1e3c904d24aa5fa6d
File Typegz
Size469.8 KB
First Seen2026-05-20
File NameHalkbankX06092025,Xbelge.gz
Tagsgz, 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: 044dc826726f29137f5e182bc45642240c10cf3c6defa8eae57c34e8c56a435e
  • MD5: dfadb79328c152a1e3c904d24aa5fa6d

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: 044dc826726f2913"
        threat_level = "medium"
        first_seen = "2026-05-20"
    condition:
        hash.sha256(0, filesize) == "044dc826726f29137f5e182bc45642240c10cf3c6defa8eae57c34e8c56a435e"
}

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 044dc826726f29137f5e182bc45642240c10cf3c6defa8eae57c34e8c56a435e # MD5 dfadb79328c152a1e3c904d24aa5fa6d
TypeValueNote
sha256 044dc826726f29137f5e182bc45642240c10cf3c6defa8eae57c34e8c56a435e Sample:MassLogger
md5 dfadb79328c152a1e3c904d24aa5fa6d Sample:MassLogger
Tags
massloggerinfostealermalwaremediumsha256hash-analizi