MassLogger | Threat Level: medium | Type: Infostealer

Cryptographic Identifiers

SHA256e258c204414702c9ee3f528845d414339f233cac8eab02b402ba959e2173c249
MD5df818b8d69d5a9ef4df866a7df4e87a7
File Typerar
Size1085.2 KB
First Seen2026-05-20
File Name09088878341234.rar
TagsMassLogger, rar

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: e258c204414702c9ee3f528845d414339f233cac8eab02b402ba959e2173c249
  • MD5: df818b8d69d5a9ef4df866a7df4e87a7

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: e258c204414702c9"
        threat_level = "medium"
        first_seen = "2026-05-20"
    condition:
        hash.sha256(0, filesize) == "e258c204414702c9ee3f528845d414339f233cac8eab02b402ba959e2173c249"
}

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 e258c204414702c9ee3f528845d414339f233cac8eab02b402ba959e2173c249 # MD5 df818b8d69d5a9ef4df866a7df4e87a7
TypeValueNote
sha256 e258c204414702c9ee3f528845d414339f233cac8eab02b402ba959e2173c249 Sample:MassLogger
md5 df818b8d69d5a9ef4df866a7df4e87a7 Sample:MassLogger
Tags
massloggerinfostealermalwaremediumsha256hash-analizi