MassLogger | Threat Level: medium | Type: Infostealer

Cryptographic Identifiers

SHA2567a1dec3e4f08d54d03df3fa12228f107471d76489432318ebff149a2b11b5d80
MD561c6604a4956ceffb839a411d4d0d245
File Typeexe
Size935.5 KB
First Seen2025-07-16
File NamePurchase_Order_35789.exe
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: 7a1dec3e4f08d54d03df3fa12228f107471d76489432318ebff149a2b11b5d80
  • MD5: 61c6604a4956ceffb839a411d4d0d245

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: 7a1dec3e4f08d54d"
        threat_level = "medium"
        first_seen = "2025-07-16"
    condition:
        hash.sha256(0, filesize) == "7a1dec3e4f08d54d03df3fa12228f107471d76489432318ebff149a2b11b5d80"
}

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 7a1dec3e4f08d54d03df3fa12228f107471d76489432318ebff149a2b11b5d80 # MD5 61c6604a4956ceffb839a411d4d0d245
TypeValueNote
sha256 7a1dec3e4f08d54d03df3fa12228f107471d76489432318ebff149a2b11b5d80 Sample:MassLogger
md5 61c6604a4956ceffb839a411d4d0d245 Sample:MassLogger
Tags
massloggerinfostealermalwaremediumsha256hash-analizi