MassLogger | Threat Level: medium | Type: Infostealer

Cryptographic Identifiers

SHA25682b9ae10b8b67e81b8b2db9a3bbb5bf49c35bad265da3a2ad367442e4f5aaddd
MD54d7b28f6a99c58d81fd6963de43b5d07
File Typexlsx
Size2401.2 KB
First Seen2025-09-06
File NamePO_ZAGO S.r.l._23678893234_JulyPayment.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: 82b9ae10b8b67e81b8b2db9a3bbb5bf49c35bad265da3a2ad367442e4f5aaddd
  • MD5: 4d7b28f6a99c58d81fd6963de43b5d07

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: 82b9ae10b8b67e81"
        threat_level = "medium"
        first_seen = "2025-09-06"
    condition:
        hash.sha256(0, filesize) == "82b9ae10b8b67e81b8b2db9a3bbb5bf49c35bad265da3a2ad367442e4f5aaddd"
}

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 82b9ae10b8b67e81b8b2db9a3bbb5bf49c35bad265da3a2ad367442e4f5aaddd # MD5 4d7b28f6a99c58d81fd6963de43b5d07
TypeValueNote
sha256 82b9ae10b8b67e81b8b2db9a3bbb5bf49c35bad265da3a2ad367442e4f5aaddd Sample:MassLogger
md5 4d7b28f6a99c58d81fd6963de43b5d07 Sample:MassLogger
Tags
massloggerinfostealermalwaremediumsha256hash-analizi