MassLogger | Threat Level: medium | Type: Infostealer

Cryptographic Identifiers

SHA2569bd11fe90ac658c0a700ac9a407812b54c921a995c0f3294f408ff56c78494ef
MD52e36b858572c570fb32c72f28f04f07d
File Typexlsx
Size2658.7 KB
First Seen2025-09-16
File Namepurchase order and price list.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: 9bd11fe90ac658c0a700ac9a407812b54c921a995c0f3294f408ff56c78494ef
  • MD5: 2e36b858572c570fb32c72f28f04f07d

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: 9bd11fe90ac658c0"
        threat_level = "medium"
        first_seen = "2025-09-16"
    condition:
        hash.sha256(0, filesize) == "9bd11fe90ac658c0a700ac9a407812b54c921a995c0f3294f408ff56c78494ef"
}

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 9bd11fe90ac658c0a700ac9a407812b54c921a995c0f3294f408ff56c78494ef # MD5 2e36b858572c570fb32c72f28f04f07d
TypeValueNote
sha256 9bd11fe90ac658c0a700ac9a407812b54c921a995c0f3294f408ff56c78494ef Sample:MassLogger
md5 2e36b858572c570fb32c72f28f04f07d Sample:MassLogger
Tags
massloggerinfostealermalwaremediumsha256hash-analizi