MassLogger | Threat Level: medium | Type: Infostealer

Cryptographic Identifiers

SHA256bd3da5f97d8b35c43ec96dedb259484caf1de63a4c1a2091963cb60444ea2c36
MD554cec58c3fe11a894c691fd7d22d9cf3
File Typeexe
Size531.0 KB
First Seen2025-09-05
File Namebd3da5f97d8b35c43ec96dedb259484caf1de63a4c1a2091963cb60444ea2c36
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: bd3da5f97d8b35c43ec96dedb259484caf1de63a4c1a2091963cb60444ea2c36
  • MD5: 54cec58c3fe11a894c691fd7d22d9cf3

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: bd3da5f97d8b35c4"
        threat_level = "medium"
        first_seen = "2025-09-05"
    condition:
        hash.sha256(0, filesize) == "bd3da5f97d8b35c43ec96dedb259484caf1de63a4c1a2091963cb60444ea2c36"
}

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 bd3da5f97d8b35c43ec96dedb259484caf1de63a4c1a2091963cb60444ea2c36 # MD5 54cec58c3fe11a894c691fd7d22d9cf3
TypeValueNote
sha256 bd3da5f97d8b35c43ec96dedb259484caf1de63a4c1a2091963cb60444ea2c36 Sample:MassLogger
md5 54cec58c3fe11a894c691fd7d22d9cf3 Sample:MassLogger
Tags
massloggerinfostealermalwaremediumsha256hash-analizi