MassLogger | Threat Level: medium | Type: Infostealer

Cryptographic Identifiers

SHA2566dfc5c344ec59f99b4f0a6cb18ce5c416ca22d3c109079750a30a8c2ce1b4329
MD53cf93580d5ecb8b50d67c8e9982730af
File Typetar
Size615.5 KB
First Seen2025-06-17
File NamePurchase Order.tar.tar
TagsMassLogger, Spam-ITA, tar

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: 6dfc5c344ec59f99b4f0a6cb18ce5c416ca22d3c109079750a30a8c2ce1b4329
  • MD5: 3cf93580d5ecb8b50d67c8e9982730af

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: 6dfc5c344ec59f99"
        threat_level = "medium"
        first_seen = "2025-06-17"
    condition:
        hash.sha256(0, filesize) == "6dfc5c344ec59f99b4f0a6cb18ce5c416ca22d3c109079750a30a8c2ce1b4329"
}

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 6dfc5c344ec59f99b4f0a6cb18ce5c416ca22d3c109079750a30a8c2ce1b4329 # MD5 3cf93580d5ecb8b50d67c8e9982730af
TypeValueNote
sha256 6dfc5c344ec59f99b4f0a6cb18ce5c416ca22d3c109079750a30a8c2ce1b4329 Sample:MassLogger
md5 3cf93580d5ecb8b50d67c8e9982730af Sample:MassLogger
Tags
massloggerinfostealermalwaremediumsha256hash-analizi