MassLogger | Threat Level: medium | Type: Infostealer

Cryptographic Identifiers

SHA2564fac0a82f59562d52b964ef719c76324216b7e7fde676aea9ce77eb72a66c5ae
MD5175ebbfd0addfcf7ba6ee693d6b4725a
File Typeiso
Size922.0 KB
First Seen2026-05-21
File Name##Swift_Copy.iso
Tagsiso, MassLogger, VIPKeylogger

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: 4fac0a82f59562d52b964ef719c76324216b7e7fde676aea9ce77eb72a66c5ae
  • MD5: 175ebbfd0addfcf7ba6ee693d6b4725a

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: 4fac0a82f59562d5"
        threat_level = "medium"
        first_seen = "2026-05-21"
    condition:
        hash.sha256(0, filesize) == "4fac0a82f59562d52b964ef719c76324216b7e7fde676aea9ce77eb72a66c5ae"
}

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 4fac0a82f59562d52b964ef719c76324216b7e7fde676aea9ce77eb72a66c5ae # MD5 175ebbfd0addfcf7ba6ee693d6b4725a
TypeValueNote
sha256 4fac0a82f59562d52b964ef719c76324216b7e7fde676aea9ce77eb72a66c5ae Sample:MassLogger
md5 175ebbfd0addfcf7ba6ee693d6b4725a Sample:MassLogger
Tags
massloggerinfostealermalwaremediumsha256hash-analizi