MassLogger | Threat Level: medium | Type: Infostealer

Cryptographic Identifiers

SHA2566d91fd24a09072f3f68afba841631578f46e9716339034b3ee2fa623565aeac0
MD5f588ee7bdbeed201c55e1d476a4fbc80
File Typevbe
Size821.9 KB
First Seen2025-10-23
File Namerrck990453.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: 6d91fd24a09072f3f68afba841631578f46e9716339034b3ee2fa623565aeac0
  • MD5: f588ee7bdbeed201c55e1d476a4fbc80

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: 6d91fd24a09072f3"
        threat_level = "medium"
        first_seen = "2025-10-23"
    condition:
        hash.sha256(0, filesize) == "6d91fd24a09072f3f68afba841631578f46e9716339034b3ee2fa623565aeac0"
}

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 6d91fd24a09072f3f68afba841631578f46e9716339034b3ee2fa623565aeac0 # MD5 f588ee7bdbeed201c55e1d476a4fbc80
TypeValueNote
sha256 6d91fd24a09072f3f68afba841631578f46e9716339034b3ee2fa623565aeac0 Sample:MassLogger
md5 f588ee7bdbeed201c55e1d476a4fbc80 Sample:MassLogger
Tags
massloggerinfostealermalwaremediumsha256hash-analizi