MassLogger | Threat Level: medium | Type: Infostealer

Cryptographic Identifiers

SHA256b77d6b67665244dff6ac0d618bce920cef9503a3d6fbd9fd6a4224345fff9661
MD513caa6ddec0f377f4a1ce2fda75dc9ec
File Typez
Size629.6 KB
First Seen2025-10-06
File NameCargo booking for BFL against PO # 8000422.Pdf.z
TagsMassLogger, z

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: b77d6b67665244dff6ac0d618bce920cef9503a3d6fbd9fd6a4224345fff9661
  • MD5: 13caa6ddec0f377f4a1ce2fda75dc9ec

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: b77d6b67665244df"
        threat_level = "medium"
        first_seen = "2025-10-06"
    condition:
        hash.sha256(0, filesize) == "b77d6b67665244dff6ac0d618bce920cef9503a3d6fbd9fd6a4224345fff9661"
}

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 b77d6b67665244dff6ac0d618bce920cef9503a3d6fbd9fd6a4224345fff9661 # MD5 13caa6ddec0f377f4a1ce2fda75dc9ec
TypeValueNote
sha256 b77d6b67665244dff6ac0d618bce920cef9503a3d6fbd9fd6a4224345fff9661 Sample:MassLogger
md5 13caa6ddec0f377f4a1ce2fda75dc9ec Sample:MassLogger
Tags
massloggerinfostealermalwaremediumsha256hash-analizi