MassLogger | Threat Level: medium | Type: Infostealer

Cryptographic Identifiers

SHA256faa236eaf11ddab3abe7dcc8c69613d89edf60da47060bf6dc881fa9e118cd9e
MD5602a4f88d3f7e60e0db420c7dec075bb
File Typeexe
Size667.0 KB
First Seen2025-09-04
File NameÜRÜN ÇİZİMİ VE ÖZELLİKLERİ_xlsx.exe
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: faa236eaf11ddab3abe7dcc8c69613d89edf60da47060bf6dc881fa9e118cd9e
  • MD5: 602a4f88d3f7e60e0db420c7dec075bb

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: faa236eaf11ddab3"
        threat_level = "medium"
        first_seen = "2025-09-04"
    condition:
        hash.sha256(0, filesize) == "faa236eaf11ddab3abe7dcc8c69613d89edf60da47060bf6dc881fa9e118cd9e"
}

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 faa236eaf11ddab3abe7dcc8c69613d89edf60da47060bf6dc881fa9e118cd9e # MD5 602a4f88d3f7e60e0db420c7dec075bb
TypeValueNote
sha256 faa236eaf11ddab3abe7dcc8c69613d89edf60da47060bf6dc881fa9e118cd9e Sample:MassLogger
md5 602a4f88d3f7e60e0db420c7dec075bb Sample:MassLogger
Tags
massloggerinfostealermalwaremediumsha256hash-analizi