MassLogger | Threat Level: medium | Type: Infostealer

Cryptographic Identifiers

SHA256f903797c9581af180489e39e8b81e145338ef06ef47a44594ef6caff40a1bc2b
MD5d4b01a8bec7b8ead1914ebe8d8c96a8f
File Typevbe
Size825.5 KB
First Seen2025-06-24
File Namell8766re3.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: f903797c9581af180489e39e8b81e145338ef06ef47a44594ef6caff40a1bc2b
  • MD5: d4b01a8bec7b8ead1914ebe8d8c96a8f

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: f903797c9581af18"
        threat_level = "medium"
        first_seen = "2025-06-24"
    condition:
        hash.sha256(0, filesize) == "f903797c9581af180489e39e8b81e145338ef06ef47a44594ef6caff40a1bc2b"
}

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 f903797c9581af180489e39e8b81e145338ef06ef47a44594ef6caff40a1bc2b # MD5 d4b01a8bec7b8ead1914ebe8d8c96a8f
TypeValueNote
sha256 f903797c9581af180489e39e8b81e145338ef06ef47a44594ef6caff40a1bc2b Sample:MassLogger
md5 d4b01a8bec7b8ead1914ebe8d8c96a8f Sample:MassLogger
Tags
massloggerinfostealermalwaremediumsha256hash-analizi