MassLogger | Threat Level: medium | Type: Infostealer

Cryptographic Identifiers

SHA256c396d4ff2505f5f79cb995e79aa69faeac8166ea0ad107f9872ff5c837ab915c
MD5bc3b50e77d36d6f798993da0bfc7fdfc
File Typeexe
Size511.0 KB
First Seen2025-06-18
File NameSecuriteInfo.com.Win32.MalwareX-gen.23187.28624
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: c396d4ff2505f5f79cb995e79aa69faeac8166ea0ad107f9872ff5c837ab915c
  • MD5: bc3b50e77d36d6f798993da0bfc7fdfc

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: c396d4ff2505f5f7"
        threat_level = "medium"
        first_seen = "2025-06-18"
    condition:
        hash.sha256(0, filesize) == "c396d4ff2505f5f79cb995e79aa69faeac8166ea0ad107f9872ff5c837ab915c"
}

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 c396d4ff2505f5f79cb995e79aa69faeac8166ea0ad107f9872ff5c837ab915c # MD5 bc3b50e77d36d6f798993da0bfc7fdfc
TypeValueNote
sha256 c396d4ff2505f5f79cb995e79aa69faeac8166ea0ad107f9872ff5c837ab915c Sample:MassLogger
md5 bc3b50e77d36d6f798993da0bfc7fdfc Sample:MassLogger
Tags
massloggerinfostealermalwaremediumsha256hash-analizi