MassLogger | Threat Level: medium | Type: Infostealer

Cryptographic Identifiers

SHA2564e6aac996c297b6d8cda748c563519e7dfacd16705c44c5a06e33890b4ee34b6
MD5c66957bdf352fdcd4ca5af66f9ec1531
File Typeexe
Size996.5 KB
First Seen2025-07-07
File Name4e6aac996c297b6d8cda748c563519e7dfacd16705c44c5a06e33890b4ee34b6
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: 4e6aac996c297b6d8cda748c563519e7dfacd16705c44c5a06e33890b4ee34b6
  • MD5: c66957bdf352fdcd4ca5af66f9ec1531

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: 4e6aac996c297b6d"
        threat_level = "medium"
        first_seen = "2025-07-07"
    condition:
        hash.sha256(0, filesize) == "4e6aac996c297b6d8cda748c563519e7dfacd16705c44c5a06e33890b4ee34b6"
}

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 4e6aac996c297b6d8cda748c563519e7dfacd16705c44c5a06e33890b4ee34b6 # MD5 c66957bdf352fdcd4ca5af66f9ec1531
TypeValueNote
sha256 4e6aac996c297b6d8cda748c563519e7dfacd16705c44c5a06e33890b4ee34b6 Sample:MassLogger
md5 c66957bdf352fdcd4ca5af66f9ec1531 Sample:MassLogger
Tags
massloggerinfostealermalwaremediumsha256hash-analizi