MassLogger | Threat Level: medium | Type: Infostealer

Cryptographic Identifiers

SHA256b6fdc7de80b3afad0be8be678dbd7dbf1edf000434f075e67bdc3236488cd1fe
MD54b8d613611a862def046214154911f3b
File Typeexe
Size785.0 KB
First Seen2025-09-25
File NameSecuriteInfo.com.Trojan.PackedNET.3415.22363.12515
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: b6fdc7de80b3afad0be8be678dbd7dbf1edf000434f075e67bdc3236488cd1fe
  • MD5: 4b8d613611a862def046214154911f3b

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: b6fdc7de80b3afad"
        threat_level = "medium"
        first_seen = "2025-09-25"
    condition:
        hash.sha256(0, filesize) == "b6fdc7de80b3afad0be8be678dbd7dbf1edf000434f075e67bdc3236488cd1fe"
}

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 b6fdc7de80b3afad0be8be678dbd7dbf1edf000434f075e67bdc3236488cd1fe # MD5 4b8d613611a862def046214154911f3b
TypeValueNote
sha256 b6fdc7de80b3afad0be8be678dbd7dbf1edf000434f075e67bdc3236488cd1fe Sample:MassLogger
md5 4b8d613611a862def046214154911f3b Sample:MassLogger
Tags
massloggerinfostealermalwaremediumsha256hash-analizi