MassLogger | Threat Level: medium | Type: Infostealer

Cryptographic Identifiers

SHA2565d16ece654d58afcb6b04849ee6655c2f709e68c6b65b6c6a26a0e9cf33bc52b
MD5838eaeb16876be091193c1f75a63d3cc
File Typeexe
Size1399.0 KB
First Seen2025-12-08
File Name5d16ece654d58afcb6b04849ee6655c2f709e68c6b65b6c6a26a0e9cf33bc52b
Tagsexe, MassLogger

Malware Family: MassLogger

MassLogger, email keylogger'dır.

TypeInfostealer
Programming LanguageC#/.NET
Target PlatformWindows
C2 ProtocolSMTP/FTP
PurposeEmail keylogger
First Seen Year2020

Threat Indicators (IOC)

  • SHA256: 5d16ece654d58afcb6b04849ee6655c2f709e68c6b65b6c6a26a0e9cf33bc52b
  • MD5: 838eaeb16876be091193c1f75a63d3cc

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: 5d16ece654d58afc"
        threat_level = "medium"
        first_seen = "2025-12-08"
    condition:
        hash.sha256(0, filesize) == "5d16ece654d58afcb6b04849ee6655c2f709e68c6b65b6c6a26a0e9cf33bc52b"
}

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 5d16ece654d58afcb6b04849ee6655c2f709e68c6b65b6c6a26a0e9cf33bc52b # MD5 838eaeb16876be091193c1f75a63d3cc
TypeValueNote
sha256 5d16ece654d58afcb6b04849ee6655c2f709e68c6b65b6c6a26a0e9cf33bc52b Sample:MassLogger
md5 838eaeb16876be091193c1f75a63d3cc Sample:MassLogger
Tags
massloggerinfostealermalwaremediumsha256hash-analizi