MassLogger | Threat Level: medium | Type: Infostealer

Cryptographic Identifiers

SHA256c13bf83a2f54a7891da4885235434bafef3dd0a00ff221db0c897dc270d91e81
MD50c4933120437659f939b744e6b69004d
File Typeexe
Size522.0 KB
First Seen2025-08-12
File NameSecuriteInfo.com.Win32.SuspectCrc.10030.30436
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: c13bf83a2f54a7891da4885235434bafef3dd0a00ff221db0c897dc270d91e81
  • MD5: 0c4933120437659f939b744e6b69004d

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: c13bf83a2f54a789"
        threat_level = "medium"
        first_seen = "2025-08-12"
    condition:
        hash.sha256(0, filesize) == "c13bf83a2f54a7891da4885235434bafef3dd0a00ff221db0c897dc270d91e81"
}

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 c13bf83a2f54a7891da4885235434bafef3dd0a00ff221db0c897dc270d91e81 # MD5 0c4933120437659f939b744e6b69004d
TypeValueNote
sha256 c13bf83a2f54a7891da4885235434bafef3dd0a00ff221db0c897dc270d91e81 Sample:MassLogger
md5 0c4933120437659f939b744e6b69004d Sample:MassLogger
Tags
massloggerinfostealermalwaremediumsha256hash-analizi