MassLogger | Threat Level: medium | Type: Infostealer

Cryptographic Identifiers

SHA2568c8055b3951939c3c52f0be27f017a2e6905aa6720582b797de6d6f8a8d4caac
MD583913c6b844437d0b8ab3c4247af6f27
File Typeexe
Size792.0 KB
First Seen2025-09-12
File NameSecuriteInfo.com.Win32.MalwareX-gen.92918913
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: 8c8055b3951939c3c52f0be27f017a2e6905aa6720582b797de6d6f8a8d4caac
  • MD5: 83913c6b844437d0b8ab3c4247af6f27

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: 8c8055b3951939c3"
        threat_level = "medium"
        first_seen = "2025-09-12"
    condition:
        hash.sha256(0, filesize) == "8c8055b3951939c3c52f0be27f017a2e6905aa6720582b797de6d6f8a8d4caac"
}

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 8c8055b3951939c3c52f0be27f017a2e6905aa6720582b797de6d6f8a8d4caac # MD5 83913c6b844437d0b8ab3c4247af6f27
TypeValueNote
sha256 8c8055b3951939c3c52f0be27f017a2e6905aa6720582b797de6d6f8a8d4caac Sample:MassLogger
md5 83913c6b844437d0b8ab3c4247af6f27 Sample:MassLogger
Tags
massloggerinfostealermalwaremediumsha256hash-analizi