MassLogger | Threat Level: medium | Type: Infostealer

Cryptographic Identifiers

SHA25625f2d7757fd6821867bc7e2b5cbe2cc56f17ba3c7aed3e748f280d4c104ab029
MD560967b907d4f7ac1e99f9573a413b193
File Typerar
Size519.6 KB
First Seen2026-05-20
File NameMB267382625AE.bz
TagsMassLogger, rar

Malware Family: MassLogger

MassLogger, email tabanlı keylogger'dır.

TypeInfostealer
Programming LanguageC#/.NET
Target PlatformWindows
C2 ProtocolSMTP/FTP
PurposeEmail keylogger
First Seen Year2020

Threat Indicators (IOC)

  • SHA256: 25f2d7757fd6821867bc7e2b5cbe2cc56f17ba3c7aed3e748f280d4c104ab029
  • MD5: 60967b907d4f7ac1e99f9573a413b193

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: 25f2d7757fd68218"
        threat_level = "medium"
        first_seen = "2026-05-20"
    condition:
        hash.sha256(0, filesize) == "25f2d7757fd6821867bc7e2b5cbe2cc56f17ba3c7aed3e748f280d4c104ab029"
}

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 25f2d7757fd6821867bc7e2b5cbe2cc56f17ba3c7aed3e748f280d4c104ab029 # MD5 60967b907d4f7ac1e99f9573a413b193
TypeValueNote
sha256 25f2d7757fd6821867bc7e2b5cbe2cc56f17ba3c7aed3e748f280d4c104ab029 Sample:MassLogger
md5 60967b907d4f7ac1e99f9573a413b193 Sample:MassLogger
Tags
massloggerinfostealermalwaremediumsha256hash-analizi