MassLogger | Threat Level: medium | Type: Infostealer

Cryptographic Identifiers

SHA256b6a2638a0eaedd6065b8fae3162ae34685c782efb70282febeef0b9470c5b60d
MD5400ef619ba4d603ec61d5cc687b0370c
File Typejs
Size1871.4 KB
First Seen2026-07-01
File NamePT2600000043.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: b6a2638a0eaedd6065b8fae3162ae34685c782efb70282febeef0b9470c5b60d
  • MD5: 400ef619ba4d603ec61d5cc687b0370c

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: b6a2638a0eaedd60"
        threat_level = "medium"
        first_seen = "2026-07-01"
    condition:
        hash.sha256(0, filesize) == "b6a2638a0eaedd6065b8fae3162ae34685c782efb70282febeef0b9470c5b60d"
}

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 b6a2638a0eaedd6065b8fae3162ae34685c782efb70282febeef0b9470c5b60d # MD5 400ef619ba4d603ec61d5cc687b0370c
TypeValueNote
sha256 b6a2638a0eaedd6065b8fae3162ae34685c782efb70282febeef0b9470c5b60d Sample:MassLogger
md5 400ef619ba4d603ec61d5cc687b0370c Sample:MassLogger
Tags
massloggerinfostealermalwaremediumsha256hash-analizi