MassLogger | Threat Level: medium | Type: Infostealer

Cryptographic Identifiers

SHA256e0721611a3de809f056720d04d62bc6b639f3825719c99ca561d0504056ed689
MD5547fd4e2c915ee289e9088eb8527e9ad
File Typevbs
Size191.2 KB
First Seen2025-07-17
File NamePayment Slip.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: e0721611a3de809f056720d04d62bc6b639f3825719c99ca561d0504056ed689
  • MD5: 547fd4e2c915ee289e9088eb8527e9ad

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: e0721611a3de809f"
        threat_level = "medium"
        first_seen = "2025-07-17"
    condition:
        hash.sha256(0, filesize) == "e0721611a3de809f056720d04d62bc6b639f3825719c99ca561d0504056ed689"
}

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 e0721611a3de809f056720d04d62bc6b639f3825719c99ca561d0504056ed689 # MD5 547fd4e2c915ee289e9088eb8527e9ad
TypeValueNote
sha256 e0721611a3de809f056720d04d62bc6b639f3825719c99ca561d0504056ed689 Sample:MassLogger
md5 547fd4e2c915ee289e9088eb8527e9ad Sample:MassLogger
Tags
massloggerinfostealermalwaremediumsha256hash-analizi