MassLogger | Threat Level: medium | Type: Infostealer

Cryptographic Identifiers

SHA2568fb28b7e2c1762c4bb023c5fe7b0cf302de82c55b956f8e4c3fdadd3ac9cf2ae
MD5880db146cab0ced82df67485039240ea
File Typez
Size625.1 KB
First Seen2025-10-09
File NameSpecifcations & Terms.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: 8fb28b7e2c1762c4bb023c5fe7b0cf302de82c55b956f8e4c3fdadd3ac9cf2ae
  • MD5: 880db146cab0ced82df67485039240ea

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: 8fb28b7e2c1762c4"
        threat_level = "medium"
        first_seen = "2025-10-09"
    condition:
        hash.sha256(0, filesize) == "8fb28b7e2c1762c4bb023c5fe7b0cf302de82c55b956f8e4c3fdadd3ac9cf2ae"
}

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 8fb28b7e2c1762c4bb023c5fe7b0cf302de82c55b956f8e4c3fdadd3ac9cf2ae # MD5 880db146cab0ced82df67485039240ea
TypeValueNote
sha256 8fb28b7e2c1762c4bb023c5fe7b0cf302de82c55b956f8e4c3fdadd3ac9cf2ae Sample:MassLogger
md5 880db146cab0ced82df67485039240ea Sample:MassLogger
Tags
massloggerinfostealermalwaremediumsha256hash-analizi