MassLogger | Threat Level: medium | Type: Infostealer

Cryptographic Identifiers

SHA25687d796dd3caceed0e5c80d06fab6fc2c8ba14591cd92848ad137040b0c2a0647
MD5f20e895e636ebce5e272f0176f8b6321
File Typeexe
Size723.0 KB
First Seen2025-08-12
File Name87d796dd3caceed0e5c80d06fab6fc2c8ba14591cd92848ad137040b0c2a0647
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: 87d796dd3caceed0e5c80d06fab6fc2c8ba14591cd92848ad137040b0c2a0647
  • MD5: f20e895e636ebce5e272f0176f8b6321

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: 87d796dd3caceed0"
        threat_level = "medium"
        first_seen = "2025-08-12"
    condition:
        hash.sha256(0, filesize) == "87d796dd3caceed0e5c80d06fab6fc2c8ba14591cd92848ad137040b0c2a0647"
}

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 87d796dd3caceed0e5c80d06fab6fc2c8ba14591cd92848ad137040b0c2a0647 # MD5 f20e895e636ebce5e272f0176f8b6321
TypeValueNote
sha256 87d796dd3caceed0e5c80d06fab6fc2c8ba14591cd92848ad137040b0c2a0647 Sample:MassLogger
md5 f20e895e636ebce5e272f0176f8b6321 Sample:MassLogger
Tags
massloggerinfostealermalwaremediumsha256hash-analizi