MassLogger | Threat Level: medium | Type: Infostealer

Cryptographic Identifiers

SHA25653b8456812e76a3730d4d993a83d87b92769a67a891bff1e3120b423a86553eb
MD5ccd6088008822dc014c23824f3b4b078
File Typezip
Size458.1 KB
First Seen2026-05-20
File NameinvoicesX2025XSOA.zip
TagsMassLogger, zip

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: 53b8456812e76a3730d4d993a83d87b92769a67a891bff1e3120b423a86553eb
  • MD5: ccd6088008822dc014c23824f3b4b078

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: 53b8456812e76a37"
        threat_level = "medium"
        first_seen = "2026-05-20"
    condition:
        hash.sha256(0, filesize) == "53b8456812e76a3730d4d993a83d87b92769a67a891bff1e3120b423a86553eb"
}

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 53b8456812e76a3730d4d993a83d87b92769a67a891bff1e3120b423a86553eb # MD5 ccd6088008822dc014c23824f3b4b078
TypeValueNote
sha256 53b8456812e76a3730d4d993a83d87b92769a67a891bff1e3120b423a86553eb Sample:MassLogger
md5 ccd6088008822dc014c23824f3b4b078 Sample:MassLogger
Tags
massloggerinfostealermalwaremediumsha256hash-analizi