MassLogger | Threat Level: medium | Type: Infostealer

Cryptographic Identifiers

SHA256a6a4be0c04b60ae7b77928507231bb35bb6c0625b61fc489ac120ee1cfe4ed54
MD5cfda148971620d3773a4e36c2fd04bf0
File Typeexe
Size992.5 KB
First Seen2026-06-08
File Namea6a4be0c04b60ae7b77928507231bb35bb6c0625b61fc489ac120ee1cfe4ed54
Tagsexe, MassLogger

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: a6a4be0c04b60ae7b77928507231bb35bb6c0625b61fc489ac120ee1cfe4ed54
  • MD5: cfda148971620d3773a4e36c2fd04bf0

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: a6a4be0c04b60ae7"
        threat_level = "medium"
        first_seen = "2026-06-08"
    condition:
        hash.sha256(0, filesize) == "a6a4be0c04b60ae7b77928507231bb35bb6c0625b61fc489ac120ee1cfe4ed54"
}

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 a6a4be0c04b60ae7b77928507231bb35bb6c0625b61fc489ac120ee1cfe4ed54 # MD5 cfda148971620d3773a4e36c2fd04bf0
TypeValueNote
sha256 a6a4be0c04b60ae7b77928507231bb35bb6c0625b61fc489ac120ee1cfe4ed54 Sample:MassLogger
md5 cfda148971620d3773a4e36c2fd04bf0 Sample:MassLogger
Tags
massloggerinfostealermalwaremediumsha256hash-analizi