MassLogger | Threat Level: medium | Type: Infostealer

Cryptographic Identifiers

SHA256904bf09d15e8d50fd0ea28d61ee09d4592f99a56f30dc7ba8603886f03d8e156
MD5a01453f61b348a04bb9367e78fa459a7
File Typeexe
Size814.5 KB
First Seen2025-06-10
File Name904bf09d15e8d50fd0ea28d61ee09d4592f99a56f30dc7ba8603886f03d8e156
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: 904bf09d15e8d50fd0ea28d61ee09d4592f99a56f30dc7ba8603886f03d8e156
  • MD5: a01453f61b348a04bb9367e78fa459a7

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: 904bf09d15e8d50f"
        threat_level = "medium"
        first_seen = "2025-06-10"
    condition:
        hash.sha256(0, filesize) == "904bf09d15e8d50fd0ea28d61ee09d4592f99a56f30dc7ba8603886f03d8e156"
}

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 904bf09d15e8d50fd0ea28d61ee09d4592f99a56f30dc7ba8603886f03d8e156 # MD5 a01453f61b348a04bb9367e78fa459a7
TypeValueNote
sha256 904bf09d15e8d50fd0ea28d61ee09d4592f99a56f30dc7ba8603886f03d8e156 Sample:MassLogger
md5 a01453f61b348a04bb9367e78fa459a7 Sample:MassLogger
Tags
massloggerinfostealermalwaremediumsha256hash-analizi