MassLogger | Threat Level: medium | Type: Infostealer

Cryptographic Identifiers

SHA256e9f9c91e6005867102c1395f5849d5105ec0bcb09fe4121f349a9dec5284883e
MD59e8f5f573c3ab6cc2b8e095384bbb677
File Typevbe
Size1273.0 KB
First Seen2025-12-09
File Namelig66543.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: e9f9c91e6005867102c1395f5849d5105ec0bcb09fe4121f349a9dec5284883e
  • MD5: 9e8f5f573c3ab6cc2b8e095384bbb677

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: e9f9c91e60058671"
        threat_level = "medium"
        first_seen = "2025-12-09"
    condition:
        hash.sha256(0, filesize) == "e9f9c91e6005867102c1395f5849d5105ec0bcb09fe4121f349a9dec5284883e"
}

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 e9f9c91e6005867102c1395f5849d5105ec0bcb09fe4121f349a9dec5284883e # MD5 9e8f5f573c3ab6cc2b8e095384bbb677
TypeValueNote
sha256 e9f9c91e6005867102c1395f5849d5105ec0bcb09fe4121f349a9dec5284883e Sample:MassLogger
md5 9e8f5f573c3ab6cc2b8e095384bbb677 Sample:MassLogger
Tags
massloggerinfostealermalwaremediumsha256hash-analizi