MassLogger | Threat Level: medium | Type: Infostealer

Cryptographic Identifiers

SHA256fb905df5f8331f4e4a47130c8b48c70fa1b8fee5f64d34365b5ca34a6872eda6
MD59391d27df10b0b2b7c436dc9d787cc8f
File Typehta
Size2311.3 KB
First Seen2026-04-28
File NameTeklifFormu_2885.hta
Tagshta, 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: fb905df5f8331f4e4a47130c8b48c70fa1b8fee5f64d34365b5ca34a6872eda6
  • MD5: 9391d27df10b0b2b7c436dc9d787cc8f

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: fb905df5f8331f4e"
        threat_level = "medium"
        first_seen = "2026-04-28"
    condition:
        hash.sha256(0, filesize) == "fb905df5f8331f4e4a47130c8b48c70fa1b8fee5f64d34365b5ca34a6872eda6"
}

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 fb905df5f8331f4e4a47130c8b48c70fa1b8fee5f64d34365b5ca34a6872eda6 # MD5 9391d27df10b0b2b7c436dc9d787cc8f
TypeValueNote
sha256 fb905df5f8331f4e4a47130c8b48c70fa1b8fee5f64d34365b5ca34a6872eda6 Sample:MassLogger
md5 9391d27df10b0b2b7c436dc9d787cc8f Sample:MassLogger
Tags
massloggerinfostealermalwaremediumsha256hash-analizi