MassLogger | Threat Level: medium | Type: Infostealer

Cryptographic Identifiers

SHA25695be98dd31c5e76dc577a6cf55f87570ed1714250785087019fa8a64ada6b1a1
MD54582d072afbb4d39a9fe5ea7f9f1c003
File Typevbe
Size1684.6 KB
First Seen2025-07-29
File NameTUBITAK SAGE-TEKLİF TALEBİ-29-07-2025_PDF.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: 95be98dd31c5e76dc577a6cf55f87570ed1714250785087019fa8a64ada6b1a1
  • MD5: 4582d072afbb4d39a9fe5ea7f9f1c003

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: 95be98dd31c5e76d"
        threat_level = "medium"
        first_seen = "2025-07-29"
    condition:
        hash.sha256(0, filesize) == "95be98dd31c5e76dc577a6cf55f87570ed1714250785087019fa8a64ada6b1a1"
}

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 95be98dd31c5e76dc577a6cf55f87570ed1714250785087019fa8a64ada6b1a1 # MD5 4582d072afbb4d39a9fe5ea7f9f1c003
TypeValueNote
sha256 95be98dd31c5e76dc577a6cf55f87570ed1714250785087019fa8a64ada6b1a1 Sample:MassLogger
md5 4582d072afbb4d39a9fe5ea7f9f1c003 Sample:MassLogger
Tags
massloggerinfostealermalwaremediumsha256hash-analizi