MassLogger | Threat Level: medium | Type: Infostealer

Cryptographic Identifiers

SHA2563c3315293e6b55efbdb2020b21f1d82b70360dfe880d2f88b5080d2abbfcbfd5
MD576373c54f92408f0e75d82252d968b46
File Typevbs
Size267.7 KB
First Seen2025-11-18
File NameFANGHUA STEEL_Q251117001.vbs
TagsMassLogger, vbs

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: 3c3315293e6b55efbdb2020b21f1d82b70360dfe880d2f88b5080d2abbfcbfd5
  • MD5: 76373c54f92408f0e75d82252d968b46

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: 3c3315293e6b55ef"
        threat_level = "medium"
        first_seen = "2025-11-18"
    condition:
        hash.sha256(0, filesize) == "3c3315293e6b55efbdb2020b21f1d82b70360dfe880d2f88b5080d2abbfcbfd5"
}

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 3c3315293e6b55efbdb2020b21f1d82b70360dfe880d2f88b5080d2abbfcbfd5 # MD5 76373c54f92408f0e75d82252d968b46
TypeValueNote
sha256 3c3315293e6b55efbdb2020b21f1d82b70360dfe880d2f88b5080d2abbfcbfd5 Sample:MassLogger
md5 76373c54f92408f0e75d82252d968b46 Sample:MassLogger
Tags
massloggerinfostealermalwaremediumsha256hash-analizi