MassLogger | Threat Level: medium | Type: Infostealer

Cryptographic Identifiers

SHA2562f3400ebe9efe2b533afadd9ba9b578315519166f96dc3cd9a2f41eb5d8f483b
MD526f82c0002d3d10812a380bfc238f461
File Typeexe
Size749.0 KB
First Seen2025-08-19
File NameSecuriteInfo.com.Trojan.PackedNET.3390.21887.29994
Tagsexe, MassLogger

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: 2f3400ebe9efe2b533afadd9ba9b578315519166f96dc3cd9a2f41eb5d8f483b
  • MD5: 26f82c0002d3d10812a380bfc238f461

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: 2f3400ebe9efe2b5"
        threat_level = "medium"
        first_seen = "2025-08-19"
    condition:
        hash.sha256(0, filesize) == "2f3400ebe9efe2b533afadd9ba9b578315519166f96dc3cd9a2f41eb5d8f483b"
}

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 2f3400ebe9efe2b533afadd9ba9b578315519166f96dc3cd9a2f41eb5d8f483b # MD5 26f82c0002d3d10812a380bfc238f461
TypeValueNote
sha256 2f3400ebe9efe2b533afadd9ba9b578315519166f96dc3cd9a2f41eb5d8f483b Sample:MassLogger
md5 26f82c0002d3d10812a380bfc238f461 Sample:MassLogger
Tags
massloggerinfostealermalwaremediumsha256hash-analizi