MassLogger | Threat Level: medium | Type: Infostealer

Cryptographic Identifiers

SHA2564374049d24a766eac84cdd1995bbd236d14956a11123de0402a8cd4669aa0be0
MD5c50f07c5da5e6dc8d165c5e98719a763
File Typevbs
Size1791.8 KB
First Seen2026-06-21
File NameRFQ#PO - PO25-08-888.vbs
TagsMassLogger, vbs

Malware Family: MassLogger

MassLogger, email tabanlı keylogger'dır.

TypeInfostealer
Programming LanguageC#/.NET
Target PlatformWindows
C2 ProtocolSMTP/FTP
PurposeEmail keylogger
First Seen Year2020

Threat Indicators (IOC)

  • SHA256: 4374049d24a766eac84cdd1995bbd236d14956a11123de0402a8cd4669aa0be0
  • MD5: c50f07c5da5e6dc8d165c5e98719a763

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: 4374049d24a766ea"
        threat_level = "medium"
        first_seen = "2026-06-21"
    condition:
        hash.sha256(0, filesize) == "4374049d24a766eac84cdd1995bbd236d14956a11123de0402a8cd4669aa0be0"
}

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 4374049d24a766eac84cdd1995bbd236d14956a11123de0402a8cd4669aa0be0 # MD5 c50f07c5da5e6dc8d165c5e98719a763
TypeValueNote
sha256 4374049d24a766eac84cdd1995bbd236d14956a11123de0402a8cd4669aa0be0 Sample:MassLogger
md5 c50f07c5da5e6dc8d165c5e98719a763 Sample:MassLogger
Tags
massloggerinfostealermalwaremediumsha256hash-analizi