MassLogger | Threat Level: medium | Type: Infostealer

Cryptographic Identifiers

SHA256c6eefea4282288e47f992c17b11bf4aae24f4096b1b1a14a6f9082f88ea983bb
MD58ae65e1147f2e0e3fa7d585fbb769f79
File Typeexe
Size573.5 KB
First Seen2025-10-09
File Namec6eefea4282288e47f992c17b11bf4aae24f4096b1b1a14a6f9082f88ea983bb
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: c6eefea4282288e47f992c17b11bf4aae24f4096b1b1a14a6f9082f88ea983bb
  • MD5: 8ae65e1147f2e0e3fa7d585fbb769f79

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: c6eefea4282288e4"
        threat_level = "medium"
        first_seen = "2025-10-09"
    condition:
        hash.sha256(0, filesize) == "c6eefea4282288e47f992c17b11bf4aae24f4096b1b1a14a6f9082f88ea983bb"
}

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 c6eefea4282288e47f992c17b11bf4aae24f4096b1b1a14a6f9082f88ea983bb # MD5 8ae65e1147f2e0e3fa7d585fbb769f79
TypeValueNote
sha256 c6eefea4282288e47f992c17b11bf4aae24f4096b1b1a14a6f9082f88ea983bb Sample:MassLogger
md5 8ae65e1147f2e0e3fa7d585fbb769f79 Sample:MassLogger
Tags
massloggerinfostealermalwaremediumsha256hash-analizi