MassLogger | Threat Level: medium | Type: Infostealer

Cryptographic Identifiers

SHA25653c7b23dcf212ba08a195bac795d5106985afb85d1b11f456c6ac52913e410be
MD5fd4091605a485a0cb5b4779c309e97a1
File Typevbe
Size972.6 KB
First Seen2025-11-18
File NameKMT_003849030398_INV09293_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: 53c7b23dcf212ba08a195bac795d5106985afb85d1b11f456c6ac52913e410be
  • MD5: fd4091605a485a0cb5b4779c309e97a1

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: 53c7b23dcf212ba0"
        threat_level = "medium"
        first_seen = "2025-11-18"
    condition:
        hash.sha256(0, filesize) == "53c7b23dcf212ba08a195bac795d5106985afb85d1b11f456c6ac52913e410be"
}

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 53c7b23dcf212ba08a195bac795d5106985afb85d1b11f456c6ac52913e410be # MD5 fd4091605a485a0cb5b4779c309e97a1
TypeValueNote
sha256 53c7b23dcf212ba08a195bac795d5106985afb85d1b11f456c6ac52913e410be Sample:MassLogger
md5 fd4091605a485a0cb5b4779c309e97a1 Sample:MassLogger
Tags
massloggerinfostealermalwaremediumsha256hash-analizi