MassLogger | Threat Level: medium | Type: Infostealer

Cryptographic Identifiers

SHA256a0519ac6b5df9be0e6d1ea2bbf76d91831d0b77b19973fab425657ceb80f29c7
MD589fb9e8c914cc2c18c10b8f88bac5438
File Typerar
Size444.9 KB
First Seen2026-05-20
File NameSingedXContractX04022025.rar
TagsMassLogger, rar

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: a0519ac6b5df9be0e6d1ea2bbf76d91831d0b77b19973fab425657ceb80f29c7
  • MD5: 89fb9e8c914cc2c18c10b8f88bac5438

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: a0519ac6b5df9be0"
        threat_level = "medium"
        first_seen = "2026-05-20"
    condition:
        hash.sha256(0, filesize) == "a0519ac6b5df9be0e6d1ea2bbf76d91831d0b77b19973fab425657ceb80f29c7"
}

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 a0519ac6b5df9be0e6d1ea2bbf76d91831d0b77b19973fab425657ceb80f29c7 # MD5 89fb9e8c914cc2c18c10b8f88bac5438
TypeValueNote
sha256 a0519ac6b5df9be0e6d1ea2bbf76d91831d0b77b19973fab425657ceb80f29c7 Sample:MassLogger
md5 89fb9e8c914cc2c18c10b8f88bac5438 Sample:MassLogger
Tags
massloggerinfostealermalwaremediumsha256hash-analizi