MassLogger | Threat Level: medium | Type: Infostealer

Cryptographic Identifiers

SHA25675912c3a8189e59f168c8bee08b1f7a157a6967ed185d610b5d154f4a61fe9a8
MD505c9e2047341fd81eb94e489acdc7bd8
File Typeexe
Size1099.0 KB
First Seen2026-06-08
File Name75912c3a8189e59f168c8bee08b1f7a157a6967ed185d610b5d154f4a61fe9a8
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: 75912c3a8189e59f168c8bee08b1f7a157a6967ed185d610b5d154f4a61fe9a8
  • MD5: 05c9e2047341fd81eb94e489acdc7bd8

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: 75912c3a8189e59f"
        threat_level = "medium"
        first_seen = "2026-06-08"
    condition:
        hash.sha256(0, filesize) == "75912c3a8189e59f168c8bee08b1f7a157a6967ed185d610b5d154f4a61fe9a8"
}

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 75912c3a8189e59f168c8bee08b1f7a157a6967ed185d610b5d154f4a61fe9a8 # MD5 05c9e2047341fd81eb94e489acdc7bd8
TypeValueNote
sha256 75912c3a8189e59f168c8bee08b1f7a157a6967ed185d610b5d154f4a61fe9a8 Sample:MassLogger
md5 05c9e2047341fd81eb94e489acdc7bd8 Sample:MassLogger
Tags
massloggerinfostealermalwaremediumsha256hash-analizi