MassLogger | Threat Level: medium | Type: Infostealer

Cryptographic Identifiers

SHA25679c71f25fff4d08dcf993dce4624521a89b5af9444daa4e2670fa729179ffa46
MD5c5a4817fbc977882ef72edaa36b2b8ac
File Typeexe
Size10711.1 KB
First Seen2025-09-03
File Namempclient.dll
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: 79c71f25fff4d08dcf993dce4624521a89b5af9444daa4e2670fa729179ffa46
  • MD5: c5a4817fbc977882ef72edaa36b2b8ac

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: 79c71f25fff4d08d"
        threat_level = "medium"
        first_seen = "2025-09-03"
    condition:
        hash.sha256(0, filesize) == "79c71f25fff4d08dcf993dce4624521a89b5af9444daa4e2670fa729179ffa46"
}

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 79c71f25fff4d08dcf993dce4624521a89b5af9444daa4e2670fa729179ffa46 # MD5 c5a4817fbc977882ef72edaa36b2b8ac
TypeValueNote
sha256 79c71f25fff4d08dcf993dce4624521a89b5af9444daa4e2670fa729179ffa46 Sample:MassLogger
md5 c5a4817fbc977882ef72edaa36b2b8ac Sample:MassLogger
Tags
massloggerinfostealermalwaremediumsha256hash-analizi