MassLogger | Threat Level: medium | Type: Infostealer

Cryptographic Identifiers

SHA2563d59374d5e5093053ae37007061ab0d17c964d40d6917345b162acc2334b3e76
MD5e3480bb81aa154901b3113af7488cc8c
File Typeexe
Size899.0 KB
First Seen2025-06-10
File Name3d59374d5e5093053ae37007061ab0d17c964d40d6917345b162acc2334b3e76
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: 3d59374d5e5093053ae37007061ab0d17c964d40d6917345b162acc2334b3e76
  • MD5: e3480bb81aa154901b3113af7488cc8c

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: 3d59374d5e509305"
        threat_level = "medium"
        first_seen = "2025-06-10"
    condition:
        hash.sha256(0, filesize) == "3d59374d5e5093053ae37007061ab0d17c964d40d6917345b162acc2334b3e76"
}

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 3d59374d5e5093053ae37007061ab0d17c964d40d6917345b162acc2334b3e76 # MD5 e3480bb81aa154901b3113af7488cc8c
TypeValueNote
sha256 3d59374d5e5093053ae37007061ab0d17c964d40d6917345b162acc2334b3e76 Sample:MassLogger
md5 e3480bb81aa154901b3113af7488cc8c Sample:MassLogger
Tags
massloggerinfostealermalwaremediumsha256hash-analizi