MassLogger | Threat Level: medium | Type: Infostealer

Cryptographic Identifiers

SHA256565a3493a68fd594074dd6dd2d379e44959d6f5d62dac865f683644d3ef4db3d
MD53aa4207ee290478eb34bef9a7c5ad1ff
File Typeexe
Size1170.0 KB
First Seen2025-08-12
File Name565a3493a68fd594074dd6dd2d379e44959d6f5d62dac865f683644d3ef4db3d
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: 565a3493a68fd594074dd6dd2d379e44959d6f5d62dac865f683644d3ef4db3d
  • MD5: 3aa4207ee290478eb34bef9a7c5ad1ff

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: 565a3493a68fd594"
        threat_level = "medium"
        first_seen = "2025-08-12"
    condition:
        hash.sha256(0, filesize) == "565a3493a68fd594074dd6dd2d379e44959d6f5d62dac865f683644d3ef4db3d"
}

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 565a3493a68fd594074dd6dd2d379e44959d6f5d62dac865f683644d3ef4db3d # MD5 3aa4207ee290478eb34bef9a7c5ad1ff
TypeValueNote
sha256 565a3493a68fd594074dd6dd2d379e44959d6f5d62dac865f683644d3ef4db3d Sample:MassLogger
md5 3aa4207ee290478eb34bef9a7c5ad1ff Sample:MassLogger
Tags
massloggerinfostealermalwaremediumsha256hash-analizi