MassLogger | Threat Level: medium | Type: Infostealer

Cryptographic Identifiers

SHA256f23f1f3c45b58e1589dd755b7bfd87fcd23897a7ead8c8c2d9bfcdbdac502d37
MD555318523ae1211ad96d151f957edbc54
File Typez
Size66.5 KB
First Seen2025-07-22
File NamenxB7PDF.z
TagsMassLogger, z

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: f23f1f3c45b58e1589dd755b7bfd87fcd23897a7ead8c8c2d9bfcdbdac502d37
  • MD5: 55318523ae1211ad96d151f957edbc54

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: f23f1f3c45b58e15"
        threat_level = "medium"
        first_seen = "2025-07-22"
    condition:
        hash.sha256(0, filesize) == "f23f1f3c45b58e1589dd755b7bfd87fcd23897a7ead8c8c2d9bfcdbdac502d37"
}

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 f23f1f3c45b58e1589dd755b7bfd87fcd23897a7ead8c8c2d9bfcdbdac502d37 # MD5 55318523ae1211ad96d151f957edbc54
TypeValueNote
sha256 f23f1f3c45b58e1589dd755b7bfd87fcd23897a7ead8c8c2d9bfcdbdac502d37 Sample:MassLogger
md5 55318523ae1211ad96d151f957edbc54 Sample:MassLogger
Tags
massloggerinfostealermalwaremediumsha256hash-analizi