MassLogger | Threat Level: medium | Type: Infostealer

Cryptographic Identifiers

SHA256733afb80ae605c51644e1cb0e5aaefbdc355ecba2513400ee9603de115a86be9
MD5fcbe6f2cbc6f13cb0a43235b6ea74d5a
File Typeexe
Size928.0 KB
First Seen2025-06-10
File Name733afb80ae605c51644e1cb0e5aaefbdc355ecba2513400ee9603de115a86be9
Tagsexe, MassLogger

Malware Family: MassLogger

MassLogger, email keylogger'dır.

TypeInfostealer
Programming LanguageC#/.NET
Target PlatformWindows
C2 ProtocolSMTP/FTP
PurposeEmail keylogger
First Seen Year2020

Threat Indicators (IOC)

  • SHA256: 733afb80ae605c51644e1cb0e5aaefbdc355ecba2513400ee9603de115a86be9
  • MD5: fcbe6f2cbc6f13cb0a43235b6ea74d5a

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: 733afb80ae605c51"
        threat_level = "medium"
        first_seen = "2025-06-10"
    condition:
        hash.sha256(0, filesize) == "733afb80ae605c51644e1cb0e5aaefbdc355ecba2513400ee9603de115a86be9"
}

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 733afb80ae605c51644e1cb0e5aaefbdc355ecba2513400ee9603de115a86be9 # MD5 fcbe6f2cbc6f13cb0a43235b6ea74d5a
TypeValueNote
sha256 733afb80ae605c51644e1cb0e5aaefbdc355ecba2513400ee9603de115a86be9 Sample:MassLogger
md5 fcbe6f2cbc6f13cb0a43235b6ea74d5a Sample:MassLogger
Tags
massloggerinfostealermalwaremediumsha256hash-analizi