MassLogger | Threat Level: medium | Type: Infostealer

Cryptographic Identifiers

SHA2563e5b5bc7054d240c93904e71e7934261057636152a3f95292b325a7d0442b884
MD5ff78109489e82c211455494c2c90843c
File Typejs
Size3881.9 KB
First Seen2026-06-10
File Namecomprobante de pago.js
Tagsjs, 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: 3e5b5bc7054d240c93904e71e7934261057636152a3f95292b325a7d0442b884
  • MD5: ff78109489e82c211455494c2c90843c

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: 3e5b5bc7054d240c"
        threat_level = "medium"
        first_seen = "2026-06-10"
    condition:
        hash.sha256(0, filesize) == "3e5b5bc7054d240c93904e71e7934261057636152a3f95292b325a7d0442b884"
}

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 3e5b5bc7054d240c93904e71e7934261057636152a3f95292b325a7d0442b884 # MD5 ff78109489e82c211455494c2c90843c
TypeValueNote
sha256 3e5b5bc7054d240c93904e71e7934261057636152a3f95292b325a7d0442b884 Sample:MassLogger
md5 ff78109489e82c211455494c2c90843c Sample:MassLogger
Tags
massloggerinfostealermalwaremediumsha256hash-analizi