MassLogger | Threat Level: medium | Type: Infostealer

Cryptographic Identifiers

SHA256fc72b3ca2ae3fb65114b8c60e539aec25d8e0383204e7cda9794e8b66d2a098c
MD569512b80a72224061f217fdd6e585c26
File Typeexe
Size3500.0 KB
First Seen2026-02-19
File NamePROFORMA INVOICE.exe
Tagsexe, 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: fc72b3ca2ae3fb65114b8c60e539aec25d8e0383204e7cda9794e8b66d2a098c
  • MD5: 69512b80a72224061f217fdd6e585c26

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: fc72b3ca2ae3fb65"
        threat_level = "medium"
        first_seen = "2026-02-19"
    condition:
        hash.sha256(0, filesize) == "fc72b3ca2ae3fb65114b8c60e539aec25d8e0383204e7cda9794e8b66d2a098c"
}

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 fc72b3ca2ae3fb65114b8c60e539aec25d8e0383204e7cda9794e8b66d2a098c # MD5 69512b80a72224061f217fdd6e585c26
TypeValueNote
sha256 fc72b3ca2ae3fb65114b8c60e539aec25d8e0383204e7cda9794e8b66d2a098c Sample:MassLogger
md5 69512b80a72224061f217fdd6e585c26 Sample:MassLogger
Tags
massloggerinfostealermalwaremediumsha256hash-analizi