MassLogger | Threat Level: medium | Type: Infostealer

Cryptographic Identifiers

SHA2563e55eb3b8e2ac98556661bb6bf4c37e72a4da1f2ded5e37118c4cb2d47b726bf
MD5a05b297fbff832313804b7e04c4f67d8
File Typevbs
Size5.4 KB
First Seen2025-08-05
File NamePO08.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: 3e55eb3b8e2ac98556661bb6bf4c37e72a4da1f2ded5e37118c4cb2d47b726bf
  • MD5: a05b297fbff832313804b7e04c4f67d8

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: 3e55eb3b8e2ac985"
        threat_level = "medium"
        first_seen = "2025-08-05"
    condition:
        hash.sha256(0, filesize) == "3e55eb3b8e2ac98556661bb6bf4c37e72a4da1f2ded5e37118c4cb2d47b726bf"
}

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 3e55eb3b8e2ac98556661bb6bf4c37e72a4da1f2ded5e37118c4cb2d47b726bf # MD5 a05b297fbff832313804b7e04c4f67d8
TypeValueNote
sha256 3e55eb3b8e2ac98556661bb6bf4c37e72a4da1f2ded5e37118c4cb2d47b726bf Sample:MassLogger
md5 a05b297fbff832313804b7e04c4f67d8 Sample:MassLogger
Tags
massloggerinfostealermalwaremediumsha256hash-analizi