MassLogger | Threat Level: medium | Type: Infostealer

Cryptographic Identifiers

SHA256bb58597acd1592b09f52ebdb71bd93809b293dacc990627d7742d7d3716dced3
MD5ee4d1b5df2f526936b2c3d6d1dec5617
File Typevbe
Size827.4 KB
First Seen2025-06-25
File Namedekont.pdf.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: bb58597acd1592b09f52ebdb71bd93809b293dacc990627d7742d7d3716dced3
  • MD5: ee4d1b5df2f526936b2c3d6d1dec5617

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: bb58597acd1592b0"
        threat_level = "medium"
        first_seen = "2025-06-25"
    condition:
        hash.sha256(0, filesize) == "bb58597acd1592b09f52ebdb71bd93809b293dacc990627d7742d7d3716dced3"
}

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 bb58597acd1592b09f52ebdb71bd93809b293dacc990627d7742d7d3716dced3 # MD5 ee4d1b5df2f526936b2c3d6d1dec5617
TypeValueNote
sha256 bb58597acd1592b09f52ebdb71bd93809b293dacc990627d7742d7d3716dced3 Sample:MassLogger
md5 ee4d1b5df2f526936b2c3d6d1dec5617 Sample:MassLogger
Tags
massloggerinfostealermalwaremediumsha256hash-analizi