MassLogger | Threat Level: medium | Type: Infostealer

Cryptographic Identifiers

SHA2567e16afaeb6faf1b31c4583a504b946c15dbb9e858185f77bdd33c4a0c668ac50
MD55313381d024ce4b6766392f2f982c31a
File Typejs
Size36.0 KB
First Seen2025-06-25
File NameDisclosure Agreement#647883-Payment2025.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: 7e16afaeb6faf1b31c4583a504b946c15dbb9e858185f77bdd33c4a0c668ac50
  • MD5: 5313381d024ce4b6766392f2f982c31a

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: 7e16afaeb6faf1b3"
        threat_level = "medium"
        first_seen = "2025-06-25"
    condition:
        hash.sha256(0, filesize) == "7e16afaeb6faf1b31c4583a504b946c15dbb9e858185f77bdd33c4a0c668ac50"
}

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 7e16afaeb6faf1b31c4583a504b946c15dbb9e858185f77bdd33c4a0c668ac50 # MD5 5313381d024ce4b6766392f2f982c31a
TypeValueNote
sha256 7e16afaeb6faf1b31c4583a504b946c15dbb9e858185f77bdd33c4a0c668ac50 Sample:MassLogger
md5 5313381d024ce4b6766392f2f982c31a Sample:MassLogger
Tags
massloggerinfostealermalwaremediumsha256hash-analizi