MassLogger | Threat Level: medium | Type: Infostealer

Cryptographic Identifiers

SHA25688488520b70af36f83351803aab59debe6b031d34bd95a47276fbc040544c496
MD5009f49b06ffb6a11360ab20d7ce57473
File Typebat
Size145.4 KB
First Seen2026-04-23
File NameQUOTATION REQUEST-R E KDB.bat
Tagsbat, MassLogger

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: 88488520b70af36f83351803aab59debe6b031d34bd95a47276fbc040544c496
  • MD5: 009f49b06ffb6a11360ab20d7ce57473

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: 88488520b70af36f"
        threat_level = "medium"
        first_seen = "2026-04-23"
    condition:
        hash.sha256(0, filesize) == "88488520b70af36f83351803aab59debe6b031d34bd95a47276fbc040544c496"
}

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 88488520b70af36f83351803aab59debe6b031d34bd95a47276fbc040544c496 # MD5 009f49b06ffb6a11360ab20d7ce57473
TypeValueNote
sha256 88488520b70af36f83351803aab59debe6b031d34bd95a47276fbc040544c496 Sample:MassLogger
md5 009f49b06ffb6a11360ab20d7ce57473 Sample:MassLogger
Tags
massloggerinfostealermalwaremediumsha256hash-analizi