MassLogger | Threat Level: medium | Type: Infostealer

Cryptographic Identifiers

SHA2569f298889e338ec83549b41aa0e20713bf17a81afe6dcce141e5085c3a4e2e8af
MD547ff11ff5f3396705688e01bbb2a171e
File Typevbs
Size153.9 KB
First Seen2025-09-18
File NameOPP00279651 - Pertanyaan.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: 9f298889e338ec83549b41aa0e20713bf17a81afe6dcce141e5085c3a4e2e8af
  • MD5: 47ff11ff5f3396705688e01bbb2a171e

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: 9f298889e338ec83"
        threat_level = "medium"
        first_seen = "2025-09-18"
    condition:
        hash.sha256(0, filesize) == "9f298889e338ec83549b41aa0e20713bf17a81afe6dcce141e5085c3a4e2e8af"
}

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 9f298889e338ec83549b41aa0e20713bf17a81afe6dcce141e5085c3a4e2e8af # MD5 47ff11ff5f3396705688e01bbb2a171e
TypeValueNote
sha256 9f298889e338ec83549b41aa0e20713bf17a81afe6dcce141e5085c3a4e2e8af Sample:MassLogger
md5 47ff11ff5f3396705688e01bbb2a171e Sample:MassLogger
Tags
massloggerinfostealermalwaremediumsha256hash-analizi