MassLogger | Threat Level: medium | Type: Infostealer

Cryptographic Identifiers

SHA256daff6666d05db409cb72e822bb115f14bfa703547292ee228dad3e5c8f19e041
MD5d2a6419eed9639cdb5c07ad8f9d19a76
File Typeexe
Size1549.0 KB
First Seen2026-05-16
File Namefile
Tagsb, dropped-by-gcleaner, exe, MassLogger, MIX3.file

Malware Family: MassLogger

MassLogger, email tabanlı keylogger'dır.

TypeInfostealer
Programming LanguageC#/.NET
Target PlatformWindows
C2 ProtocolSMTP/FTP
PurposeEmail keylogger
First Seen Year2020

Threat Indicators (IOC)

  • SHA256: daff6666d05db409cb72e822bb115f14bfa703547292ee228dad3e5c8f19e041
  • MD5: d2a6419eed9639cdb5c07ad8f9d19a76

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: daff6666d05db409"
        threat_level = "medium"
        first_seen = "2026-05-16"
    condition:
        hash.sha256(0, filesize) == "daff6666d05db409cb72e822bb115f14bfa703547292ee228dad3e5c8f19e041"
}

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 daff6666d05db409cb72e822bb115f14bfa703547292ee228dad3e5c8f19e041 # MD5 d2a6419eed9639cdb5c07ad8f9d19a76
TypeValueNote
sha256 daff6666d05db409cb72e822bb115f14bfa703547292ee228dad3e5c8f19e041 Sample:MassLogger
md5 d2a6419eed9639cdb5c07ad8f9d19a76 Sample:MassLogger
Tags
massloggerinfostealermalwaremediumsha256hash-analizi