MassLogger | Threat Level: medium | Type: Infostealer

Cryptographic Identifiers

SHA25681f43212e742e727bce8e5381f4fb497a1f922f6b463a2c09fc903f1da48204e
MD50e7185b37f0fbdc5ae99e47db794e74d
File Typevbe
Size1247.1 KB
First Seen2025-11-25
File Namedekont.pdf.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: 81f43212e742e727bce8e5381f4fb497a1f922f6b463a2c09fc903f1da48204e
  • MD5: 0e7185b37f0fbdc5ae99e47db794e74d

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: 81f43212e742e727"
        threat_level = "medium"
        first_seen = "2025-11-25"
    condition:
        hash.sha256(0, filesize) == "81f43212e742e727bce8e5381f4fb497a1f922f6b463a2c09fc903f1da48204e"
}

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 81f43212e742e727bce8e5381f4fb497a1f922f6b463a2c09fc903f1da48204e # MD5 0e7185b37f0fbdc5ae99e47db794e74d
TypeValueNote
sha256 81f43212e742e727bce8e5381f4fb497a1f922f6b463a2c09fc903f1da48204e Sample:MassLogger
md5 0e7185b37f0fbdc5ae99e47db794e74d Sample:MassLogger
Tags
massloggerinfostealermalwaremediumsha256hash-analizi