MassLogger | Threat Level: medium | Type: Infostealer

Cryptographic Identifiers

SHA2569d5c8e9c41ff08b0a3be489ac1ef0f014f2749ad0e3217af2e0665c514a072fc
MD538951bb0b8f73de25014f4d9ef401286
File Typeexe
Size742.5 KB
First Seen2025-10-09
File Name9d5c8e9c41ff08b0a3be489ac1ef0f014f2749ad0e3217af2e0665c514a072fc
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: 9d5c8e9c41ff08b0a3be489ac1ef0f014f2749ad0e3217af2e0665c514a072fc
  • MD5: 38951bb0b8f73de25014f4d9ef401286

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: 9d5c8e9c41ff08b0"
        threat_level = "medium"
        first_seen = "2025-10-09"
    condition:
        hash.sha256(0, filesize) == "9d5c8e9c41ff08b0a3be489ac1ef0f014f2749ad0e3217af2e0665c514a072fc"
}

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 9d5c8e9c41ff08b0a3be489ac1ef0f014f2749ad0e3217af2e0665c514a072fc # MD5 38951bb0b8f73de25014f4d9ef401286
TypeValueNote
sha256 9d5c8e9c41ff08b0a3be489ac1ef0f014f2749ad0e3217af2e0665c514a072fc Sample:MassLogger
md5 38951bb0b8f73de25014f4d9ef401286 Sample:MassLogger
Tags
massloggerinfostealermalwaremediumsha256hash-analizi