MassLogger | Threat Level: medium | Type: Infostealer

Cryptographic Identifiers

SHA25696d9e6bb1e7002c2b7fa1999b923dafc69acd3b97bfea5fa18558da69abfa0e5
MD5a2bfbc5c289836bdaee0014034801ab1
File Typeexe
Size1169.5 KB
First Seen2025-07-21
File NamePurchase enquiry-PO20259633.exe
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: 96d9e6bb1e7002c2b7fa1999b923dafc69acd3b97bfea5fa18558da69abfa0e5
  • MD5: a2bfbc5c289836bdaee0014034801ab1

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: 96d9e6bb1e7002c2"
        threat_level = "medium"
        first_seen = "2025-07-21"
    condition:
        hash.sha256(0, filesize) == "96d9e6bb1e7002c2b7fa1999b923dafc69acd3b97bfea5fa18558da69abfa0e5"
}

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 96d9e6bb1e7002c2b7fa1999b923dafc69acd3b97bfea5fa18558da69abfa0e5 # MD5 a2bfbc5c289836bdaee0014034801ab1
TypeValueNote
sha256 96d9e6bb1e7002c2b7fa1999b923dafc69acd3b97bfea5fa18558da69abfa0e5 Sample:MassLogger
md5 a2bfbc5c289836bdaee0014034801ab1 Sample:MassLogger
Tags
massloggerinfostealermalwaremediumsha256hash-analizi