MassLogger | Threat Level: medium | Type: Infostealer

Cryptographic Identifiers

SHA2563fbfa1b663262c6680de89a01bc35815b31a8520c155794091f48a726a6305ec
MD50662c153e6eb314765f4f49a184f1a16
File Typeexe
Size857.5 KB
First Seen2025-08-19
File NameSecuriteInfo.com.Win32.MalwareX-gen.57459623
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: 3fbfa1b663262c6680de89a01bc35815b31a8520c155794091f48a726a6305ec
  • MD5: 0662c153e6eb314765f4f49a184f1a16

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: 3fbfa1b663262c66"
        threat_level = "medium"
        first_seen = "2025-08-19"
    condition:
        hash.sha256(0, filesize) == "3fbfa1b663262c6680de89a01bc35815b31a8520c155794091f48a726a6305ec"
}

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 3fbfa1b663262c6680de89a01bc35815b31a8520c155794091f48a726a6305ec # MD5 0662c153e6eb314765f4f49a184f1a16
TypeValueNote
sha256 3fbfa1b663262c6680de89a01bc35815b31a8520c155794091f48a726a6305ec Sample:MassLogger
md5 0662c153e6eb314765f4f49a184f1a16 Sample:MassLogger
Tags
massloggerinfostealermalwaremediumsha256hash-analizi