MassLogger | Threat Level: medium | Type: Infostealer

Cryptographic Identifiers

SHA2565ea572bc60e811027a4cb1098794eb2dc6bdeae545d8eb27b66c0b48b1688efe
MD5e46c6772ad83c5bde17092d0b013c363
File Typeexe
Size540.0 KB
First Seen2026-05-20
File NamePROFORMA_INVOICE.exe
Tagsexe, 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: 5ea572bc60e811027a4cb1098794eb2dc6bdeae545d8eb27b66c0b48b1688efe
  • MD5: e46c6772ad83c5bde17092d0b013c363

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: 5ea572bc60e81102"
        threat_level = "medium"
        first_seen = "2026-05-20"
    condition:
        hash.sha256(0, filesize) == "5ea572bc60e811027a4cb1098794eb2dc6bdeae545d8eb27b66c0b48b1688efe"
}

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 5ea572bc60e811027a4cb1098794eb2dc6bdeae545d8eb27b66c0b48b1688efe # MD5 e46c6772ad83c5bde17092d0b013c363
TypeValueNote
sha256 5ea572bc60e811027a4cb1098794eb2dc6bdeae545d8eb27b66c0b48b1688efe Sample:MassLogger
md5 e46c6772ad83c5bde17092d0b013c363 Sample:MassLogger
Tags
massloggerinfostealermalwaremediumsha256hash-analizi