MassLogger | Threat Level: medium | Type: Infostealer

Cryptographic Identifiers

SHA25651b036522abdbc3cd223aaa8dde959ae3f02b80bd1955f61442fcc8e15696a88
MD593430a36f0f77bc33b0c778ffdf51721
File Typeexe
Size571.5 KB
First Seen2025-09-05
File Name51b036522abdbc3cd223aaa8dde959ae3f02b80bd1955f61442fcc8e15696a88
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: 51b036522abdbc3cd223aaa8dde959ae3f02b80bd1955f61442fcc8e15696a88
  • MD5: 93430a36f0f77bc33b0c778ffdf51721

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: 51b036522abdbc3c"
        threat_level = "medium"
        first_seen = "2025-09-05"
    condition:
        hash.sha256(0, filesize) == "51b036522abdbc3cd223aaa8dde959ae3f02b80bd1955f61442fcc8e15696a88"
}

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 51b036522abdbc3cd223aaa8dde959ae3f02b80bd1955f61442fcc8e15696a88 # MD5 93430a36f0f77bc33b0c778ffdf51721
TypeValueNote
sha256 51b036522abdbc3cd223aaa8dde959ae3f02b80bd1955f61442fcc8e15696a88 Sample:MassLogger
md5 93430a36f0f77bc33b0c778ffdf51721 Sample:MassLogger
Tags
massloggerinfostealermalwaremediumsha256hash-analizi