MassLogger | Threat Level: medium | Type: Infostealer

Cryptographic Identifiers

SHA2562366eb1c3c5a10b3782f7d6948cb6a3b43fb20e348bc9d1ac2e4a2e96b13075a
MD5626fd6d3146d08f16fb4f26a018cf36f
File Typeexe
Size724.0 KB
First Seen2025-08-13
File NameÖLÇÜ ÇİZİMİ VE ŞARTNAME.pif
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: 2366eb1c3c5a10b3782f7d6948cb6a3b43fb20e348bc9d1ac2e4a2e96b13075a
  • MD5: 626fd6d3146d08f16fb4f26a018cf36f

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: 2366eb1c3c5a10b3"
        threat_level = "medium"
        first_seen = "2025-08-13"
    condition:
        hash.sha256(0, filesize) == "2366eb1c3c5a10b3782f7d6948cb6a3b43fb20e348bc9d1ac2e4a2e96b13075a"
}

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 2366eb1c3c5a10b3782f7d6948cb6a3b43fb20e348bc9d1ac2e4a2e96b13075a # MD5 626fd6d3146d08f16fb4f26a018cf36f
TypeValueNote
sha256 2366eb1c3c5a10b3782f7d6948cb6a3b43fb20e348bc9d1ac2e4a2e96b13075a Sample:MassLogger
md5 626fd6d3146d08f16fb4f26a018cf36f Sample:MassLogger
Tags
massloggerinfostealermalwaremediumsha256hash-analizi