MassLogger | Threat Level: medium | Type: Infostealer

Cryptographic Identifiers

SHA256a6c4f4b0e6df5033db3fffc8239c22b376ebdb5a1de76d66371da62db32b268f
MD5f40a4ec6630d5542f81d39ff056d8a39
File Typeexe
Size823.5 KB
First Seen2026-06-08
File Namea6c4f4b0e6df5033db3fffc8239c22b376ebdb5a1de76d66371da62db32b268f
Tagsexe, MassLogger

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: a6c4f4b0e6df5033db3fffc8239c22b376ebdb5a1de76d66371da62db32b268f
  • MD5: f40a4ec6630d5542f81d39ff056d8a39

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: a6c4f4b0e6df5033"
        threat_level = "medium"
        first_seen = "2026-06-08"
    condition:
        hash.sha256(0, filesize) == "a6c4f4b0e6df5033db3fffc8239c22b376ebdb5a1de76d66371da62db32b268f"
}

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 a6c4f4b0e6df5033db3fffc8239c22b376ebdb5a1de76d66371da62db32b268f # MD5 f40a4ec6630d5542f81d39ff056d8a39
TypeValueNote
sha256 a6c4f4b0e6df5033db3fffc8239c22b376ebdb5a1de76d66371da62db32b268f Sample:MassLogger
md5 f40a4ec6630d5542f81d39ff056d8a39 Sample:MassLogger
Tags
massloggerinfostealermalwaremediumsha256hash-analizi