MassLogger | Threat Level: medium | Type: Infostealer

Cryptographic Identifiers

SHA256d564fc65ddd232f1b7c2a80a08661a2275dc6bce08b94938c5fb59d24fdb1024
MD5a3cb2ee1eda9d65b7359185f2c754e3b
File Typeiso
Size70.0 KB
First Seen2025-08-27
File NamenxB7PDF.iso
Tagsiso, 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: d564fc65ddd232f1b7c2a80a08661a2275dc6bce08b94938c5fb59d24fdb1024
  • MD5: a3cb2ee1eda9d65b7359185f2c754e3b

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: d564fc65ddd232f1"
        threat_level = "medium"
        first_seen = "2025-08-27"
    condition:
        hash.sha256(0, filesize) == "d564fc65ddd232f1b7c2a80a08661a2275dc6bce08b94938c5fb59d24fdb1024"
}

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 d564fc65ddd232f1b7c2a80a08661a2275dc6bce08b94938c5fb59d24fdb1024 # MD5 a3cb2ee1eda9d65b7359185f2c754e3b
TypeValueNote
sha256 d564fc65ddd232f1b7c2a80a08661a2275dc6bce08b94938c5fb59d24fdb1024 Sample:MassLogger
md5 a3cb2ee1eda9d65b7359185f2c754e3b Sample:MassLogger
Tags
massloggerinfostealermalwaremediumsha256hash-analizi