MassLogger | Threat Level: medium | Type: Infostealer

Cryptographic Identifiers

SHA2566a67e00f44edf98b5940f65f8ab9076a6ee5f54aca2131e370d9919aad577f4a
MD54045cfe18ef6c0a958c0c4039810b56c
File Typerar
Size727.2 KB
First Seen2026-05-21
File NameMaersk_Shipping_Document.rar
TagsMassLogger, rar

Malware Family: MassLogger

MassLogger, email tabanlı keylogger'dır.

TypeInfostealer
Programming LanguageC#/.NET
Target PlatformWindows
C2 ProtocolSMTP/FTP
PurposeEmail keylogger
First Seen Year2020

Threat Indicators (IOC)

  • SHA256: 6a67e00f44edf98b5940f65f8ab9076a6ee5f54aca2131e370d9919aad577f4a
  • MD5: 4045cfe18ef6c0a958c0c4039810b56c

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: 6a67e00f44edf98b"
        threat_level = "medium"
        first_seen = "2026-05-21"
    condition:
        hash.sha256(0, filesize) == "6a67e00f44edf98b5940f65f8ab9076a6ee5f54aca2131e370d9919aad577f4a"
}

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 6a67e00f44edf98b5940f65f8ab9076a6ee5f54aca2131e370d9919aad577f4a # MD5 4045cfe18ef6c0a958c0c4039810b56c
TypeValueNote
sha256 6a67e00f44edf98b5940f65f8ab9076a6ee5f54aca2131e370d9919aad577f4a Sample:MassLogger
md5 4045cfe18ef6c0a958c0c4039810b56c Sample:MassLogger
Tags
massloggerinfostealermalwaremediumsha256hash-analizi