MassLogger | Threat Level: medium | Type: Infostealer

Cryptographic Identifiers

SHA2563174a8769770f2af09f93e0949500f95d8c56d0be0ff56c94a8dd74173b2240c
MD55783bf18f93361ec25e6a9775342c145
File Typezip
Size51.4 KB
First Seen2026-05-20
File NameINV77820.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: 3174a8769770f2af09f93e0949500f95d8c56d0be0ff56c94a8dd74173b2240c
  • MD5: 5783bf18f93361ec25e6a9775342c145

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: 3174a8769770f2af"
        threat_level = "medium"
        first_seen = "2026-05-20"
    condition:
        hash.sha256(0, filesize) == "3174a8769770f2af09f93e0949500f95d8c56d0be0ff56c94a8dd74173b2240c"
}

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 3174a8769770f2af09f93e0949500f95d8c56d0be0ff56c94a8dd74173b2240c # MD5 5783bf18f93361ec25e6a9775342c145
TypeValueNote
sha256 3174a8769770f2af09f93e0949500f95d8c56d0be0ff56c94a8dd74173b2240c Sample:MassLogger
md5 5783bf18f93361ec25e6a9775342c145 Sample:MassLogger
Tags
massloggerinfostealermalwaremediumsha256hash-analizi