MassLogger | Threat Level: medium | Type: Infostealer

Cryptographic Identifiers

SHA256b662ca7522283cbe69ec71e9d4427b36173e83bf661ec94deb3d3a8c6fa9de12
MD5d4a4a94c2eb4a3b099ad3c15cae8767b
File Typetar
Size3.0 KB
First Seen2025-09-24
File NameIntesaXSanpaoloX_AvvisoXdiXPagamento.pdf.tar
Tags45-141-87-195, IntesaSanPaolo, MassLogger, Spam-ITA, tar

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: b662ca7522283cbe69ec71e9d4427b36173e83bf661ec94deb3d3a8c6fa9de12
  • MD5: d4a4a94c2eb4a3b099ad3c15cae8767b

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: b662ca7522283cbe"
        threat_level = "medium"
        first_seen = "2025-09-24"
    condition:
        hash.sha256(0, filesize) == "b662ca7522283cbe69ec71e9d4427b36173e83bf661ec94deb3d3a8c6fa9de12"
}

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 b662ca7522283cbe69ec71e9d4427b36173e83bf661ec94deb3d3a8c6fa9de12 # MD5 d4a4a94c2eb4a3b099ad3c15cae8767b
TypeValueNote
sha256 b662ca7522283cbe69ec71e9d4427b36173e83bf661ec94deb3d3a8c6fa9de12 Sample:MassLogger
md5 d4a4a94c2eb4a3b099ad3c15cae8767b Sample:MassLogger
Tags
massloggerinfostealermalwaremediumsha256hash-analizi