MassLogger | Threat Level: medium | Type: Infostealer

Cryptographic Identifiers

SHA256a534cc811354388f83a4dde6f1898bda4752ad567594d7656d7c71f86383881a
MD503a9977a4afc275055518e99d79b1e59
File Typeexe
Size589.5 KB
First Seen2025-10-09
File Namea534cc811354388f83a4dde6f1898bda4752ad567594d7656d7c71f86383881a
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: a534cc811354388f83a4dde6f1898bda4752ad567594d7656d7c71f86383881a
  • MD5: 03a9977a4afc275055518e99d79b1e59

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: a534cc811354388f"
        threat_level = "medium"
        first_seen = "2025-10-09"
    condition:
        hash.sha256(0, filesize) == "a534cc811354388f83a4dde6f1898bda4752ad567594d7656d7c71f86383881a"
}

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 a534cc811354388f83a4dde6f1898bda4752ad567594d7656d7c71f86383881a # MD5 03a9977a4afc275055518e99d79b1e59
TypeValueNote
sha256 a534cc811354388f83a4dde6f1898bda4752ad567594d7656d7c71f86383881a Sample:MassLogger
md5 03a9977a4afc275055518e99d79b1e59 Sample:MassLogger
Tags
massloggerinfostealermalwaremediumsha256hash-analizi