MassLogger | Threat Level: medium | Type: Infostealer

Cryptographic Identifiers

SHA2564c2f87c10ab9eecaeed2619a2f3e3b6513bac85304f89c8b07bf4052896a729d
MD5623b33a151443c8e7d71d6e699afc5a2
File Typeiso
Size838.0 KB
First Seen2026-05-21
File NameSwift_#7562024.iso
Tagsiso, 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: 4c2f87c10ab9eecaeed2619a2f3e3b6513bac85304f89c8b07bf4052896a729d
  • MD5: 623b33a151443c8e7d71d6e699afc5a2

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: 4c2f87c10ab9eeca"
        threat_level = "medium"
        first_seen = "2026-05-21"
    condition:
        hash.sha256(0, filesize) == "4c2f87c10ab9eecaeed2619a2f3e3b6513bac85304f89c8b07bf4052896a729d"
}

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 4c2f87c10ab9eecaeed2619a2f3e3b6513bac85304f89c8b07bf4052896a729d # MD5 623b33a151443c8e7d71d6e699afc5a2
TypeValueNote
sha256 4c2f87c10ab9eecaeed2619a2f3e3b6513bac85304f89c8b07bf4052896a729d Sample:MassLogger
md5 623b33a151443c8e7d71d6e699afc5a2 Sample:MassLogger
Tags
massloggerinfostealermalwaremediumsha256hash-analizi