MassLogger | Threat Level: medium | Type: Infostealer

Cryptographic Identifiers

SHA2563531c881adb7d222460e89d318fbe1babb5de4115960783c32a1c6d0388796d8
MD547c50bcbc1f57d0c5140264217627fbb
File Typeexe
Size1023.5 KB
First Seen2025-08-12
File Name3531c881adb7d222460e89d318fbe1babb5de4115960783c32a1c6d0388796d8
Tagsexe, MassLogger

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: 3531c881adb7d222460e89d318fbe1babb5de4115960783c32a1c6d0388796d8
  • MD5: 47c50bcbc1f57d0c5140264217627fbb

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: 3531c881adb7d222"
        threat_level = "medium"
        first_seen = "2025-08-12"
    condition:
        hash.sha256(0, filesize) == "3531c881adb7d222460e89d318fbe1babb5de4115960783c32a1c6d0388796d8"
}

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 3531c881adb7d222460e89d318fbe1babb5de4115960783c32a1c6d0388796d8 # MD5 47c50bcbc1f57d0c5140264217627fbb
TypeValueNote
sha256 3531c881adb7d222460e89d318fbe1babb5de4115960783c32a1c6d0388796d8 Sample:MassLogger
md5 47c50bcbc1f57d0c5140264217627fbb Sample:MassLogger
Tags
massloggerinfostealermalwaremediumsha256hash-analizi