MassLogger | Threat Level: medium | Type: Infostealer

Cryptographic Identifiers

SHA256c5e4aa78af496b5eba31db0d046a0d9165174d60b28dd6acec669628a2c9bf30
MD5871e1c5a366415267166228694ddf6a0
File Typeexe
Size749.0 KB
First Seen2025-08-19
File NameSecuriteInfo.com.Trojan.PackedNET.3390.29723.3002
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: c5e4aa78af496b5eba31db0d046a0d9165174d60b28dd6acec669628a2c9bf30
  • MD5: 871e1c5a366415267166228694ddf6a0

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: c5e4aa78af496b5e"
        threat_level = "medium"
        first_seen = "2025-08-19"
    condition:
        hash.sha256(0, filesize) == "c5e4aa78af496b5eba31db0d046a0d9165174d60b28dd6acec669628a2c9bf30"
}

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 c5e4aa78af496b5eba31db0d046a0d9165174d60b28dd6acec669628a2c9bf30 # MD5 871e1c5a366415267166228694ddf6a0
TypeValueNote
sha256 c5e4aa78af496b5eba31db0d046a0d9165174d60b28dd6acec669628a2c9bf30 Sample:MassLogger
md5 871e1c5a366415267166228694ddf6a0 Sample:MassLogger
Tags
massloggerinfostealermalwaremediumsha256hash-analizi