MassLogger | Threat Level: medium | Type: Infostealer

Cryptographic Identifiers

SHA256c9e434249c8233d35e8bb5a03cdd049a100ed54ecb6d1080b25b3aabcc73f2e5
MD59e76617f3bb207e3bbdb2df9528d33ee
File Typeexe
Size915.0 KB
First Seen2025-09-13
File NameSecuriteInfo.com.Win32.MalwareX-gen.64731711
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: c9e434249c8233d35e8bb5a03cdd049a100ed54ecb6d1080b25b3aabcc73f2e5
  • MD5: 9e76617f3bb207e3bbdb2df9528d33ee

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: c9e434249c8233d3"
        threat_level = "medium"
        first_seen = "2025-09-13"
    condition:
        hash.sha256(0, filesize) == "c9e434249c8233d35e8bb5a03cdd049a100ed54ecb6d1080b25b3aabcc73f2e5"
}

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 c9e434249c8233d35e8bb5a03cdd049a100ed54ecb6d1080b25b3aabcc73f2e5 # MD5 9e76617f3bb207e3bbdb2df9528d33ee
TypeValueNote
sha256 c9e434249c8233d35e8bb5a03cdd049a100ed54ecb6d1080b25b3aabcc73f2e5 Sample:MassLogger
md5 9e76617f3bb207e3bbdb2df9528d33ee Sample:MassLogger
Tags
massloggerinfostealermalwaremediumsha256hash-analizi