MassLogger | Threat Level: medium | Type: Infostealer

Cryptographic Identifiers

SHA256f3ae1f390f004972e602b8b070160e765520a17e6b6a291a2901d69e6d349320
MD5ac8c907c502025981008ac503b647a51
File Typexlsx
Size2239.6 KB
First Seen2025-08-26
File NameRFQ.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: f3ae1f390f004972e602b8b070160e765520a17e6b6a291a2901d69e6d349320
  • MD5: ac8c907c502025981008ac503b647a51

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: f3ae1f390f004972"
        threat_level = "medium"
        first_seen = "2025-08-26"
    condition:
        hash.sha256(0, filesize) == "f3ae1f390f004972e602b8b070160e765520a17e6b6a291a2901d69e6d349320"
}

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 f3ae1f390f004972e602b8b070160e765520a17e6b6a291a2901d69e6d349320 # MD5 ac8c907c502025981008ac503b647a51
TypeValueNote
sha256 f3ae1f390f004972e602b8b070160e765520a17e6b6a291a2901d69e6d349320 Sample:MassLogger
md5 ac8c907c502025981008ac503b647a51 Sample:MassLogger
Tags
massloggerinfostealermalwaremediumsha256hash-analizi