MassLogger | Threat Level: medium | Type: Infostealer

Cryptographic Identifiers

SHA25641c67baec9ef07f4a603cdf2f89a8cb85b81f28c869fd559b93207064d668d68
MD5ea2db2f3f13b277c13a96ba3073425d2
File Typerar
Size540.4 KB
First Seen2026-05-20
File NameProformaXInvoice-0098763432436-pdf.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: 41c67baec9ef07f4a603cdf2f89a8cb85b81f28c869fd559b93207064d668d68
  • MD5: ea2db2f3f13b277c13a96ba3073425d2

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: 41c67baec9ef07f4"
        threat_level = "medium"
        first_seen = "2026-05-20"
    condition:
        hash.sha256(0, filesize) == "41c67baec9ef07f4a603cdf2f89a8cb85b81f28c869fd559b93207064d668d68"
}

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 41c67baec9ef07f4a603cdf2f89a8cb85b81f28c869fd559b93207064d668d68 # MD5 ea2db2f3f13b277c13a96ba3073425d2
TypeValueNote
sha256 41c67baec9ef07f4a603cdf2f89a8cb85b81f28c869fd559b93207064d668d68 Sample:MassLogger
md5 ea2db2f3f13b277c13a96ba3073425d2 Sample:MassLogger
Tags
massloggerinfostealermalwaremediumsha256hash-analizi