MassLogger | Threat Level: medium | Type: Infostealer

Cryptographic Identifiers

SHA25658ea06e2f9f4c8108e1803ca0869805eae62c5f9f0651e6b53e66a0aafb3c349
MD5f5005b42237d968c5770c165f6798c28
File Typeexe
Size539.5 KB
First Seen2025-08-01
File NameSecuriteInfo.com.Win32.MalwareX-gen.19126.22805
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: 58ea06e2f9f4c8108e1803ca0869805eae62c5f9f0651e6b53e66a0aafb3c349
  • MD5: f5005b42237d968c5770c165f6798c28

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: 58ea06e2f9f4c810"
        threat_level = "medium"
        first_seen = "2025-08-01"
    condition:
        hash.sha256(0, filesize) == "58ea06e2f9f4c8108e1803ca0869805eae62c5f9f0651e6b53e66a0aafb3c349"
}

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 58ea06e2f9f4c8108e1803ca0869805eae62c5f9f0651e6b53e66a0aafb3c349 # MD5 f5005b42237d968c5770c165f6798c28
TypeValueNote
sha256 58ea06e2f9f4c8108e1803ca0869805eae62c5f9f0651e6b53e66a0aafb3c349 Sample:MassLogger
md5 f5005b42237d968c5770c165f6798c28 Sample:MassLogger
Tags
massloggerinfostealermalwaremediumsha256hash-analizi