MassLogger | Threat Level: medium | Type: Infostealer

Cryptographic Identifiers

SHA2560c5f6715cb9eca0d4ae9a8ee174c9022cdb4c4faa95b1924677e3dfb72cdb1f2
MD50c52c7d9637c55c2d6c802617a1d3915
File Typeexe
Size845.2 KB
First Seen2025-07-24
File NameQUOTATION2821-3300.exe
Tagsexe, MassLogger, signed

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: 0c5f6715cb9eca0d4ae9a8ee174c9022cdb4c4faa95b1924677e3dfb72cdb1f2
  • MD5: 0c52c7d9637c55c2d6c802617a1d3915

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: 0c5f6715cb9eca0d"
        threat_level = "medium"
        first_seen = "2025-07-24"
    condition:
        hash.sha256(0, filesize) == "0c5f6715cb9eca0d4ae9a8ee174c9022cdb4c4faa95b1924677e3dfb72cdb1f2"
}

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 0c5f6715cb9eca0d4ae9a8ee174c9022cdb4c4faa95b1924677e3dfb72cdb1f2 # MD5 0c52c7d9637c55c2d6c802617a1d3915
TypeValueNote
sha256 0c5f6715cb9eca0d4ae9a8ee174c9022cdb4c4faa95b1924677e3dfb72cdb1f2 Sample:MassLogger
md5 0c52c7d9637c55c2d6c802617a1d3915 Sample:MassLogger
Tags
massloggerinfostealermalwaremediumsha256hash-analizi