MassLogger | Threat Level: medium | Type: Infostealer

Cryptographic Identifiers

SHA256b3117e84343f3296038c1f2bc91ae2ce0a1eef33855b535dbc0a6110c541bb6d
MD503e410ca9dcb987d99cedf74f4ae5078
File Typeexe
Size774.0 KB
First Seen2025-09-03
File NameSecuriteInfo.com.Win32.MalwareX-gen.35984659
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: b3117e84343f3296038c1f2bc91ae2ce0a1eef33855b535dbc0a6110c541bb6d
  • MD5: 03e410ca9dcb987d99cedf74f4ae5078

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: b3117e84343f3296"
        threat_level = "medium"
        first_seen = "2025-09-03"
    condition:
        hash.sha256(0, filesize) == "b3117e84343f3296038c1f2bc91ae2ce0a1eef33855b535dbc0a6110c541bb6d"
}

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 b3117e84343f3296038c1f2bc91ae2ce0a1eef33855b535dbc0a6110c541bb6d # MD5 03e410ca9dcb987d99cedf74f4ae5078
TypeValueNote
sha256 b3117e84343f3296038c1f2bc91ae2ce0a1eef33855b535dbc0a6110c541bb6d Sample:MassLogger
md5 03e410ca9dcb987d99cedf74f4ae5078 Sample:MassLogger
Tags
massloggerinfostealermalwaremediumsha256hash-analizi