MassLogger | Threat Level: medium | Type: Infostealer

Cryptographic Identifiers

SHA2565fc32757f836c4bac03e3f73d3e7d6866ec64bb54ac4bc7228f3e1d0be3b4aee
MD5657ad10f11d6e8b4fc7746bf70f78674
File Typevbe
Size1684.6 KB
First Seen2025-07-26
File NameÇİZİM VE BOYUTLAR_xlsx.vbe
Tagsgeo, MassLogger, TUR, 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: 5fc32757f836c4bac03e3f73d3e7d6866ec64bb54ac4bc7228f3e1d0be3b4aee
  • MD5: 657ad10f11d6e8b4fc7746bf70f78674

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: 5fc32757f836c4ba"
        threat_level = "medium"
        first_seen = "2025-07-26"
    condition:
        hash.sha256(0, filesize) == "5fc32757f836c4bac03e3f73d3e7d6866ec64bb54ac4bc7228f3e1d0be3b4aee"
}

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 5fc32757f836c4bac03e3f73d3e7d6866ec64bb54ac4bc7228f3e1d0be3b4aee # MD5 657ad10f11d6e8b4fc7746bf70f78674
TypeValueNote
sha256 5fc32757f836c4bac03e3f73d3e7d6866ec64bb54ac4bc7228f3e1d0be3b4aee Sample:MassLogger
md5 657ad10f11d6e8b4fc7746bf70f78674 Sample:MassLogger
Tags
massloggerinfostealermalwaremediumsha256hash-analizi