MassLogger | Threat Level: medium | Type: Infostealer

Cryptographic Identifiers

SHA256a4eeb9128d194452e080fb025d7126904f1f99b124075cbbb84bf54e2e78fd43
MD512438ef3c7a03ec9b926261b8588deaa
File Typejs
Size31.2 KB
First Seen2026-04-20
File Namegtgktvifpqldtxjn7rzcsdwqldtxjn7.js
Tagsexe, js, 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: a4eeb9128d194452e080fb025d7126904f1f99b124075cbbb84bf54e2e78fd43
  • MD5: 12438ef3c7a03ec9b926261b8588deaa

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: a4eeb9128d194452"
        threat_level = "medium"
        first_seen = "2026-04-20"
    condition:
        hash.sha256(0, filesize) == "a4eeb9128d194452e080fb025d7126904f1f99b124075cbbb84bf54e2e78fd43"
}

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 a4eeb9128d194452e080fb025d7126904f1f99b124075cbbb84bf54e2e78fd43 # MD5 12438ef3c7a03ec9b926261b8588deaa
TypeValueNote
sha256 a4eeb9128d194452e080fb025d7126904f1f99b124075cbbb84bf54e2e78fd43 Sample:MassLogger
md5 12438ef3c7a03ec9b926261b8588deaa Sample:MassLogger
Tags
massloggerinfostealermalwaremediumsha256hash-analizi