MassLogger | Threat Level: medium | Type: Infostealer

Cryptographic Identifiers

SHA256c84ab78fdb66362d708fed200b32db68942e9c0f1d4c0f1fd30ba890a057cbb9
MD5fc9dc0b21094102ed013eb8b3dcf9276
File Typevbe
Size544.2 KB
First Seen2025-10-10
File NameRFQ_10102025.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: c84ab78fdb66362d708fed200b32db68942e9c0f1d4c0f1fd30ba890a057cbb9
  • MD5: fc9dc0b21094102ed013eb8b3dcf9276

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: c84ab78fdb66362d"
        threat_level = "medium"
        first_seen = "2025-10-10"
    condition:
        hash.sha256(0, filesize) == "c84ab78fdb66362d708fed200b32db68942e9c0f1d4c0f1fd30ba890a057cbb9"
}

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 c84ab78fdb66362d708fed200b32db68942e9c0f1d4c0f1fd30ba890a057cbb9 # MD5 fc9dc0b21094102ed013eb8b3dcf9276
TypeValueNote
sha256 c84ab78fdb66362d708fed200b32db68942e9c0f1d4c0f1fd30ba890a057cbb9 Sample:MassLogger
md5 fc9dc0b21094102ed013eb8b3dcf9276 Sample:MassLogger
Tags
massloggerinfostealermalwaremediumsha256hash-analizi