MassLogger | Threat Level: medium | Type: Infostealer

Cryptographic Identifiers

SHA256e0c223c32b5a099b8be2c78731102f857ef5f9fb641a0e22542dd6dea5d125d7
MD575285dfbeec0b4c75f74c9043f4f9669
File Typexlsx
Size2257.6 KB
First Seen2025-09-03
File NameNew Order 23.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: e0c223c32b5a099b8be2c78731102f857ef5f9fb641a0e22542dd6dea5d125d7
  • MD5: 75285dfbeec0b4c75f74c9043f4f9669

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: e0c223c32b5a099b"
        threat_level = "medium"
        first_seen = "2025-09-03"
    condition:
        hash.sha256(0, filesize) == "e0c223c32b5a099b8be2c78731102f857ef5f9fb641a0e22542dd6dea5d125d7"
}

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 e0c223c32b5a099b8be2c78731102f857ef5f9fb641a0e22542dd6dea5d125d7 # MD5 75285dfbeec0b4c75f74c9043f4f9669
TypeValueNote
sha256 e0c223c32b5a099b8be2c78731102f857ef5f9fb641a0e22542dd6dea5d125d7 Sample:MassLogger
md5 75285dfbeec0b4c75f74c9043f4f9669 Sample:MassLogger
Tags
massloggerinfostealermalwaremediumsha256hash-analizi