MassLogger | Threat Level: medium | Type: Infostealer

Cryptographic Identifiers

SHA25674c95c21bbd84cd2e8da78764bf8a8c35f3d862d8e62f8647e3bb71bcea3eee1
MD5571bdaa66fc3f1bcbb3a337e0879c615
File Typeexe
Size599.0 KB
First Seen2025-08-12
File Name74c95c21bbd84cd2e8da78764bf8a8c35f3d862d8e62f8647e3bb71bcea3eee1
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: 74c95c21bbd84cd2e8da78764bf8a8c35f3d862d8e62f8647e3bb71bcea3eee1
  • MD5: 571bdaa66fc3f1bcbb3a337e0879c615

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: 74c95c21bbd84cd2"
        threat_level = "medium"
        first_seen = "2025-08-12"
    condition:
        hash.sha256(0, filesize) == "74c95c21bbd84cd2e8da78764bf8a8c35f3d862d8e62f8647e3bb71bcea3eee1"
}

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 74c95c21bbd84cd2e8da78764bf8a8c35f3d862d8e62f8647e3bb71bcea3eee1 # MD5 571bdaa66fc3f1bcbb3a337e0879c615
TypeValueNote
sha256 74c95c21bbd84cd2e8da78764bf8a8c35f3d862d8e62f8647e3bb71bcea3eee1 Sample:MassLogger
md5 571bdaa66fc3f1bcbb3a337e0879c615 Sample:MassLogger
Tags
massloggerinfostealermalwaremediumsha256hash-analizi