MassLogger | Threat Level: medium | Type: Infostealer

Cryptographic Identifiers

SHA2565f0c1e6643531444cada92f54702c1f60894484cce980f70132f04f753a398f9
MD593b0dcd2ef6d983ec428eed4cf6482af
File Typeexe
Size584.5 KB
First Seen2025-06-10
File Name5f0c1e6643531444cada92f54702c1f60894484cce980f70132f04f753a398f9
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: 5f0c1e6643531444cada92f54702c1f60894484cce980f70132f04f753a398f9
  • MD5: 93b0dcd2ef6d983ec428eed4cf6482af

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: 5f0c1e6643531444"
        threat_level = "medium"
        first_seen = "2025-06-10"
    condition:
        hash.sha256(0, filesize) == "5f0c1e6643531444cada92f54702c1f60894484cce980f70132f04f753a398f9"
}

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 5f0c1e6643531444cada92f54702c1f60894484cce980f70132f04f753a398f9 # MD5 93b0dcd2ef6d983ec428eed4cf6482af
TypeValueNote
sha256 5f0c1e6643531444cada92f54702c1f60894484cce980f70132f04f753a398f9 Sample:MassLogger
md5 93b0dcd2ef6d983ec428eed4cf6482af Sample:MassLogger
Tags
massloggerinfostealermalwaremediumsha256hash-analizi