MassLogger | Threat Level: medium | Type: Infostealer

Cryptographic Identifiers

SHA2566ee6b8c1ca6f5f593c90c89261f06b3cc33d14263f19b4f76d3d1aff205cf14f
MD5115c327f70cce999e8956331af46480e
File Typeexe
Size631.5 KB
First Seen2025-08-12
File Name6ee6b8c1ca6f5f593c90c89261f06b3cc33d14263f19b4f76d3d1aff205cf14f
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: 6ee6b8c1ca6f5f593c90c89261f06b3cc33d14263f19b4f76d3d1aff205cf14f
  • MD5: 115c327f70cce999e8956331af46480e

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: 6ee6b8c1ca6f5f59"
        threat_level = "medium"
        first_seen = "2025-08-12"
    condition:
        hash.sha256(0, filesize) == "6ee6b8c1ca6f5f593c90c89261f06b3cc33d14263f19b4f76d3d1aff205cf14f"
}

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 6ee6b8c1ca6f5f593c90c89261f06b3cc33d14263f19b4f76d3d1aff205cf14f # MD5 115c327f70cce999e8956331af46480e
TypeValueNote
sha256 6ee6b8c1ca6f5f593c90c89261f06b3cc33d14263f19b4f76d3d1aff205cf14f Sample:MassLogger
md5 115c327f70cce999e8956331af46480e Sample:MassLogger
Tags
massloggerinfostealermalwaremediumsha256hash-analizi