MassLogger | Threat Level: medium | Type: Infostealer

Cryptographic Identifiers

SHA25677ca1676f7f17f340ee91a434d169576b4636d68a1f52dadf0d1b9506d7a7313
MD5ce8ef4b7c95fdd55cc154186951c9428
File Typejs
Size3164.9 KB
First Seen2026-06-23
File NameDA GUANG 11.14.2025.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: 77ca1676f7f17f340ee91a434d169576b4636d68a1f52dadf0d1b9506d7a7313
  • MD5: ce8ef4b7c95fdd55cc154186951c9428

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: 77ca1676f7f17f34"
        threat_level = "medium"
        first_seen = "2026-06-23"
    condition:
        hash.sha256(0, filesize) == "77ca1676f7f17f340ee91a434d169576b4636d68a1f52dadf0d1b9506d7a7313"
}

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 77ca1676f7f17f340ee91a434d169576b4636d68a1f52dadf0d1b9506d7a7313 # MD5 ce8ef4b7c95fdd55cc154186951c9428
TypeValueNote
sha256 77ca1676f7f17f340ee91a434d169576b4636d68a1f52dadf0d1b9506d7a7313 Sample:MassLogger
md5 ce8ef4b7c95fdd55cc154186951c9428 Sample:MassLogger
Tags
massloggerinfostealermalwaremediumsha256hash-analizi