MassLogger | Threat Level: medium | Type: Infostealer

Cryptographic Identifiers

SHA256f73fab97f18b4700229b7eb9ded13c97fc99145057b1c6abc58f80272e3e21f7
MD52e86da2a3d940369cc3ea06bf173cfc3
File Typeexe
Size754.0 KB
First Seen2025-06-10
File Namef73fab97f18b4700229b7eb9ded13c97fc99145057b1c6abc58f80272e3e21f7
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: f73fab97f18b4700229b7eb9ded13c97fc99145057b1c6abc58f80272e3e21f7
  • MD5: 2e86da2a3d940369cc3ea06bf173cfc3

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: f73fab97f18b4700"
        threat_level = "medium"
        first_seen = "2025-06-10"
    condition:
        hash.sha256(0, filesize) == "f73fab97f18b4700229b7eb9ded13c97fc99145057b1c6abc58f80272e3e21f7"
}

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 f73fab97f18b4700229b7eb9ded13c97fc99145057b1c6abc58f80272e3e21f7 # MD5 2e86da2a3d940369cc3ea06bf173cfc3
TypeValueNote
sha256 f73fab97f18b4700229b7eb9ded13c97fc99145057b1c6abc58f80272e3e21f7 Sample:MassLogger
md5 2e86da2a3d940369cc3ea06bf173cfc3 Sample:MassLogger
Tags
massloggerinfostealermalwaremediumsha256hash-analizi