MassLogger | Threat Level: medium | Type: Infostealer

Cryptographic Identifiers

SHA256ac1a878f82a993c57511f7c556f48388de5e335e6402b42de6b27dad022acf4f
MD5db4a68595a233355c743a556ad897ecd
File Typeexe
Size638.5 KB
First Seen2025-06-10
File Nameac1a878f82a993c57511f7c556f48388de5e335e6402b42de6b27dad022acf4f
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: ac1a878f82a993c57511f7c556f48388de5e335e6402b42de6b27dad022acf4f
  • MD5: db4a68595a233355c743a556ad897ecd

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: ac1a878f82a993c5"
        threat_level = "medium"
        first_seen = "2025-06-10"
    condition:
        hash.sha256(0, filesize) == "ac1a878f82a993c57511f7c556f48388de5e335e6402b42de6b27dad022acf4f"
}

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 ac1a878f82a993c57511f7c556f48388de5e335e6402b42de6b27dad022acf4f # MD5 db4a68595a233355c743a556ad897ecd
TypeValueNote
sha256 ac1a878f82a993c57511f7c556f48388de5e335e6402b42de6b27dad022acf4f Sample:MassLogger
md5 db4a68595a233355c743a556ad897ecd Sample:MassLogger
Tags
massloggerinfostealermalwaremediumsha256hash-analizi