MassLogger | Threat Level: medium | Type: Infostealer

Cryptographic Identifiers

SHA256cf34f37cacd360a8dc2578edc225661e36e3bd1b8b51019507cf523a4b9f9418
MD54975e98511edcd50ab8a7c633cf66c67
File Typeexe
Size636.0 KB
First Seen2025-07-29
File NameEP3C10F256C8N340pc-Intelparts.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: cf34f37cacd360a8dc2578edc225661e36e3bd1b8b51019507cf523a4b9f9418
  • MD5: 4975e98511edcd50ab8a7c633cf66c67

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: cf34f37cacd360a8"
        threat_level = "medium"
        first_seen = "2025-07-29"
    condition:
        hash.sha256(0, filesize) == "cf34f37cacd360a8dc2578edc225661e36e3bd1b8b51019507cf523a4b9f9418"
}

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 cf34f37cacd360a8dc2578edc225661e36e3bd1b8b51019507cf523a4b9f9418 # MD5 4975e98511edcd50ab8a7c633cf66c67
TypeValueNote
sha256 cf34f37cacd360a8dc2578edc225661e36e3bd1b8b51019507cf523a4b9f9418 Sample:MassLogger
md5 4975e98511edcd50ab8a7c633cf66c67 Sample:MassLogger
Tags
massloggerinfostealermalwaremediumsha256hash-analizi