MassLogger | Threat Level: medium | Type: Infostealer

Cryptographic Identifiers

SHA256e240c03534823e910d9d7e609c19c344f0e78c9470c820af790b2bbbfffea8ed
MD5bc22cf0175f66010ad47cc3c9221bf51
File Typexlsx
Size706.6 KB
First Seen2025-07-04
File NamePayment Advise.xlam
TagsCVE-2017-11882, MassLogger, xlam, xlsx

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: e240c03534823e910d9d7e609c19c344f0e78c9470c820af790b2bbbfffea8ed
  • MD5: bc22cf0175f66010ad47cc3c9221bf51

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: e240c03534823e91"
        threat_level = "medium"
        first_seen = "2025-07-04"
    condition:
        hash.sha256(0, filesize) == "e240c03534823e910d9d7e609c19c344f0e78c9470c820af790b2bbbfffea8ed"
}

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 e240c03534823e910d9d7e609c19c344f0e78c9470c820af790b2bbbfffea8ed # MD5 bc22cf0175f66010ad47cc3c9221bf51
TypeValueNote
sha256 e240c03534823e910d9d7e609c19c344f0e78c9470c820af790b2bbbfffea8ed Sample:MassLogger
md5 bc22cf0175f66010ad47cc3c9221bf51 Sample:MassLogger
Tags
massloggerinfostealermalwaremediumsha256hash-analizi