MassLogger | Threat Level: medium | Type: Infostealer

Cryptographic Identifiers

SHA2564825c308253bbb6f7549a3d04d793e62c56032365b505299d18e0c7c611ac1c9
MD5a4a9176334aa9526cf299388b7dde4de
File Typejs
Size1118.8 KB
First Seen2026-02-10
File NameET7809790878972.js
Tagsjs, MassLogger

Malware Family: MassLogger

MassLogger, email keylogger'dır.

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

Threat Indicators (IOC)

  • SHA256: 4825c308253bbb6f7549a3d04d793e62c56032365b505299d18e0c7c611ac1c9
  • MD5: a4a9176334aa9526cf299388b7dde4de

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: 4825c308253bbb6f"
        threat_level = "medium"
        first_seen = "2026-02-10"
    condition:
        hash.sha256(0, filesize) == "4825c308253bbb6f7549a3d04d793e62c56032365b505299d18e0c7c611ac1c9"
}

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 4825c308253bbb6f7549a3d04d793e62c56032365b505299d18e0c7c611ac1c9 # MD5 a4a9176334aa9526cf299388b7dde4de
TypeValueNote
sha256 4825c308253bbb6f7549a3d04d793e62c56032365b505299d18e0c7c611ac1c9 Sample:MassLogger
md5 a4a9176334aa9526cf299388b7dde4de Sample:MassLogger
Tags
massloggerinfostealermalwaremediumsha256hash-analizi