MassLogger | Threat Level: medium | Type: Infostealer

Cryptographic Identifiers

SHA256619fecd78af21d2a8e9278c744b519a7c1d69c753544964d70dfa3c7c54e1565
MD5d1191c44d22ca1f7098a6bee926f977f
File Typeexe
Size858.5 KB
First Seen2025-08-19
File NameSecuriteInfo.com.Win32.MalwareX-gen.75697527
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: 619fecd78af21d2a8e9278c744b519a7c1d69c753544964d70dfa3c7c54e1565
  • MD5: d1191c44d22ca1f7098a6bee926f977f

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: 619fecd78af21d2a"
        threat_level = "medium"
        first_seen = "2025-08-19"
    condition:
        hash.sha256(0, filesize) == "619fecd78af21d2a8e9278c744b519a7c1d69c753544964d70dfa3c7c54e1565"
}

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 619fecd78af21d2a8e9278c744b519a7c1d69c753544964d70dfa3c7c54e1565 # MD5 d1191c44d22ca1f7098a6bee926f977f
TypeValueNote
sha256 619fecd78af21d2a8e9278c744b519a7c1d69c753544964d70dfa3c7c54e1565 Sample:MassLogger
md5 d1191c44d22ca1f7098a6bee926f977f Sample:MassLogger
Tags
massloggerinfostealermalwaremediumsha256hash-analizi