MassLogger | Threat Level: medium | Type: Infostealer

Cryptographic Identifiers

SHA2563a120eebc11796c039efb1e6d45ad79505b09527fcfc580ccbd3550c2b4a2382
MD5775db5ef94aad4d35e253ec7477fbd36
File Typeexe
Size531.0 KB
First Seen2025-08-15
File NameSecuriteInfo.com.Win32.MalwareX-gen.11750.19423
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: 3a120eebc11796c039efb1e6d45ad79505b09527fcfc580ccbd3550c2b4a2382
  • MD5: 775db5ef94aad4d35e253ec7477fbd36

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: 3a120eebc11796c0"
        threat_level = "medium"
        first_seen = "2025-08-15"
    condition:
        hash.sha256(0, filesize) == "3a120eebc11796c039efb1e6d45ad79505b09527fcfc580ccbd3550c2b4a2382"
}

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 3a120eebc11796c039efb1e6d45ad79505b09527fcfc580ccbd3550c2b4a2382 # MD5 775db5ef94aad4d35e253ec7477fbd36
TypeValueNote
sha256 3a120eebc11796c039efb1e6d45ad79505b09527fcfc580ccbd3550c2b4a2382 Sample:MassLogger
md5 775db5ef94aad4d35e253ec7477fbd36 Sample:MassLogger
Tags
massloggerinfostealermalwaremediumsha256hash-analizi