MassLogger | Threat Level: medium | Type: Infostealer

Cryptographic Identifiers

SHA2569c678ab883fe4d7faf0febf6fdc60bbc0279aebeee63c850a6d52e7699985a19
MD502362ba84eed73fa8f76e6b7326d6be0
File Typevbs
Size16.4 KB
First Seen2025-10-14
File NameTEKLİF FORMU 15655.vbs
TagsMassLogger, vbs

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: 9c678ab883fe4d7faf0febf6fdc60bbc0279aebeee63c850a6d52e7699985a19
  • MD5: 02362ba84eed73fa8f76e6b7326d6be0

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: 9c678ab883fe4d7f"
        threat_level = "medium"
        first_seen = "2025-10-14"
    condition:
        hash.sha256(0, filesize) == "9c678ab883fe4d7faf0febf6fdc60bbc0279aebeee63c850a6d52e7699985a19"
}

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 9c678ab883fe4d7faf0febf6fdc60bbc0279aebeee63c850a6d52e7699985a19 # MD5 02362ba84eed73fa8f76e6b7326d6be0
TypeValueNote
sha256 9c678ab883fe4d7faf0febf6fdc60bbc0279aebeee63c850a6d52e7699985a19 Sample:MassLogger
md5 02362ba84eed73fa8f76e6b7326d6be0 Sample:MassLogger
Tags
massloggerinfostealermalwaremediumsha256hash-analizi