MassLogger | Threat Level: medium | Type: Infostealer

Cryptographic Identifiers

SHA25699825c4300ec470e5cb5cc04bdbe8ee0e40caeb57a4b4f50c51c1fa2ab5d8729
MD5d7161eb45ddd36a27b25b734ba5fd62b
File Typeexe
Size997.0 KB
First Seen2025-06-10
File Name99825c4300ec470e5cb5cc04bdbe8ee0e40caeb57a4b4f50c51c1fa2ab5d8729
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: 99825c4300ec470e5cb5cc04bdbe8ee0e40caeb57a4b4f50c51c1fa2ab5d8729
  • MD5: d7161eb45ddd36a27b25b734ba5fd62b

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: 99825c4300ec470e"
        threat_level = "medium"
        first_seen = "2025-06-10"
    condition:
        hash.sha256(0, filesize) == "99825c4300ec470e5cb5cc04bdbe8ee0e40caeb57a4b4f50c51c1fa2ab5d8729"
}

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 99825c4300ec470e5cb5cc04bdbe8ee0e40caeb57a4b4f50c51c1fa2ab5d8729 # MD5 d7161eb45ddd36a27b25b734ba5fd62b
TypeValueNote
sha256 99825c4300ec470e5cb5cc04bdbe8ee0e40caeb57a4b4f50c51c1fa2ab5d8729 Sample:MassLogger
md5 d7161eb45ddd36a27b25b734ba5fd62b Sample:MassLogger
Tags
massloggerinfostealermalwaremediumsha256hash-analizi