MassLogger | Threat Level: medium | Type: Infostealer

Cryptographic Identifiers

SHA25671829f75b01941def1951cd3aa880d0f5e779cebf6d5737d24fe3a93705a7d22
MD5d4bebcd0938e4803da14961a31b74258
File Typejs
Size1611.7 KB
First Seen2026-06-22
File NameINVOICE_PAYMENT_TT_PDF.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: 71829f75b01941def1951cd3aa880d0f5e779cebf6d5737d24fe3a93705a7d22
  • MD5: d4bebcd0938e4803da14961a31b74258

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: 71829f75b01941de"
        threat_level = "medium"
        first_seen = "2026-06-22"
    condition:
        hash.sha256(0, filesize) == "71829f75b01941def1951cd3aa880d0f5e779cebf6d5737d24fe3a93705a7d22"
}

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 71829f75b01941def1951cd3aa880d0f5e779cebf6d5737d24fe3a93705a7d22 # MD5 d4bebcd0938e4803da14961a31b74258
TypeValueNote
sha256 71829f75b01941def1951cd3aa880d0f5e779cebf6d5737d24fe3a93705a7d22 Sample:MassLogger
md5 d4bebcd0938e4803da14961a31b74258 Sample:MassLogger
Tags
massloggerinfostealermalwaremediumsha256hash-analizi