MassLogger | Threat Level: medium | Type: Infostealer

Cryptographic Identifiers

SHA256e12b5b829cc5821f7f99f9dd8a11d22da157eb3259b29c40a8ea61acdd3be4b0
MD5a4ae5681d5a758fb8257de67fdb22e19
File Typeexe
Size708.5 KB
First Seen2025-08-14
File NameSecuriteInfo.com.Trojan.PackedNET.3392.27145.6240
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: e12b5b829cc5821f7f99f9dd8a11d22da157eb3259b29c40a8ea61acdd3be4b0
  • MD5: a4ae5681d5a758fb8257de67fdb22e19

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: e12b5b829cc5821f"
        threat_level = "medium"
        first_seen = "2025-08-14"
    condition:
        hash.sha256(0, filesize) == "e12b5b829cc5821f7f99f9dd8a11d22da157eb3259b29c40a8ea61acdd3be4b0"
}

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 e12b5b829cc5821f7f99f9dd8a11d22da157eb3259b29c40a8ea61acdd3be4b0 # MD5 a4ae5681d5a758fb8257de67fdb22e19
TypeValueNote
sha256 e12b5b829cc5821f7f99f9dd8a11d22da157eb3259b29c40a8ea61acdd3be4b0 Sample:MassLogger
md5 a4ae5681d5a758fb8257de67fdb22e19 Sample:MassLogger
Tags
massloggerinfostealermalwaremediumsha256hash-analizi