MassLogger | Threat Level: medium | Type: Infostealer

Cryptographic Identifiers

SHA2569d6c0643e954b2f82ca423628543e0d58f47c9fd7e9fddf4ceea404a0dd918bd
MD50cbfcc3573399368a2a9abcfa42af134
File Typejs
Size3955.4 KB
First Seen2026-06-11
File NameRFQ _NEG260005904.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: 9d6c0643e954b2f82ca423628543e0d58f47c9fd7e9fddf4ceea404a0dd918bd
  • MD5: 0cbfcc3573399368a2a9abcfa42af134

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: 9d6c0643e954b2f8"
        threat_level = "medium"
        first_seen = "2026-06-11"
    condition:
        hash.sha256(0, filesize) == "9d6c0643e954b2f82ca423628543e0d58f47c9fd7e9fddf4ceea404a0dd918bd"
}

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 9d6c0643e954b2f82ca423628543e0d58f47c9fd7e9fddf4ceea404a0dd918bd # MD5 0cbfcc3573399368a2a9abcfa42af134
TypeValueNote
sha256 9d6c0643e954b2f82ca423628543e0d58f47c9fd7e9fddf4ceea404a0dd918bd Sample:MassLogger
md5 0cbfcc3573399368a2a9abcfa42af134 Sample:MassLogger
Tags
massloggerinfostealermalwaremediumsha256hash-analizi