MassLogger | Threat Level: medium | Type: Infostealer

Cryptographic Identifiers

SHA2566bb586291242c8a75cf42a4d2a8f414a04fcd16ba1e8b730bbf21980600b2bc0
MD554ed828dec29f684fa4a22a883509dce
File Typeexe
Size456.3 KB
First Seen2025-12-08
File Name6bb586291242c8a75cf42a4d2a8f414a04fcd16ba1e8b730bbf21980600b2bc0
Tagsexe, MassLogger, signed

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: 6bb586291242c8a75cf42a4d2a8f414a04fcd16ba1e8b730bbf21980600b2bc0
  • MD5: 54ed828dec29f684fa4a22a883509dce

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: 6bb586291242c8a7"
        threat_level = "medium"
        first_seen = "2025-12-08"
    condition:
        hash.sha256(0, filesize) == "6bb586291242c8a75cf42a4d2a8f414a04fcd16ba1e8b730bbf21980600b2bc0"
}

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 6bb586291242c8a75cf42a4d2a8f414a04fcd16ba1e8b730bbf21980600b2bc0 # MD5 54ed828dec29f684fa4a22a883509dce
TypeValueNote
sha256 6bb586291242c8a75cf42a4d2a8f414a04fcd16ba1e8b730bbf21980600b2bc0 Sample:MassLogger
md5 54ed828dec29f684fa4a22a883509dce Sample:MassLogger
Tags
massloggerinfostealermalwaremediumsha256hash-analizi