MassLogger | Threat Level: medium | Type: Infostealer

Cryptographic Identifiers

SHA256c6a42e14c36c380762a8073f3cb76eaaed22afc713a0561a79aec5e5abef021e
MD5b241876a2888d426e31b00107306e982
File Typevbe
Size543.3 KB
First Seen2025-10-07
File Namerck99430.VBE
TagsMassLogger, vbe

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: c6a42e14c36c380762a8073f3cb76eaaed22afc713a0561a79aec5e5abef021e
  • MD5: b241876a2888d426e31b00107306e982

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: c6a42e14c36c3807"
        threat_level = "medium"
        first_seen = "2025-10-07"
    condition:
        hash.sha256(0, filesize) == "c6a42e14c36c380762a8073f3cb76eaaed22afc713a0561a79aec5e5abef021e"
}

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 c6a42e14c36c380762a8073f3cb76eaaed22afc713a0561a79aec5e5abef021e # MD5 b241876a2888d426e31b00107306e982
TypeValueNote
sha256 c6a42e14c36c380762a8073f3cb76eaaed22afc713a0561a79aec5e5abef021e Sample:MassLogger
md5 b241876a2888d426e31b00107306e982 Sample:MassLogger
Tags
massloggerinfostealermalwaremediumsha256hash-analizi