MassLogger | Threat Level: medium | Type: Infostealer

Cryptographic Identifiers

SHA256d139f12bc1d4c56ec47f2e9eebe25b381a51eab9c62575dd96e56b6f23390be4
MD55460054248bd1cd5a3091dd5490c6dc6
File Typevbs
Size1229.6 KB
First Seen2026-02-18
File NamePO MSKU#00133618.vbs
TagsMassLogger, vbs

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: d139f12bc1d4c56ec47f2e9eebe25b381a51eab9c62575dd96e56b6f23390be4
  • MD5: 5460054248bd1cd5a3091dd5490c6dc6

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: d139f12bc1d4c56e"
        threat_level = "medium"
        first_seen = "2026-02-18"
    condition:
        hash.sha256(0, filesize) == "d139f12bc1d4c56ec47f2e9eebe25b381a51eab9c62575dd96e56b6f23390be4"
}

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 d139f12bc1d4c56ec47f2e9eebe25b381a51eab9c62575dd96e56b6f23390be4 # MD5 5460054248bd1cd5a3091dd5490c6dc6
TypeValueNote
sha256 d139f12bc1d4c56ec47f2e9eebe25b381a51eab9c62575dd96e56b6f23390be4 Sample:MassLogger
md5 5460054248bd1cd5a3091dd5490c6dc6 Sample:MassLogger
Tags
massloggerinfostealermalwaremediumsha256hash-analizi