MassLogger | Threat Level: medium | Type: Infostealer

Cryptographic Identifiers

SHA25666513d2b0ca211cd190997156119713b7b8704a49a28fb9a8328749b9dc2cd45
MD5e9dee95b8dade115653b772a2793e7b7
File Typeexe
Size571.5 KB
First Seen2025-08-19
File NameSecuriteInfo.com.Trojan.PackedNET.3390.11106.12417
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: 66513d2b0ca211cd190997156119713b7b8704a49a28fb9a8328749b9dc2cd45
  • MD5: e9dee95b8dade115653b772a2793e7b7

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: 66513d2b0ca211cd"
        threat_level = "medium"
        first_seen = "2025-08-19"
    condition:
        hash.sha256(0, filesize) == "66513d2b0ca211cd190997156119713b7b8704a49a28fb9a8328749b9dc2cd45"
}

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 66513d2b0ca211cd190997156119713b7b8704a49a28fb9a8328749b9dc2cd45 # MD5 e9dee95b8dade115653b772a2793e7b7
TypeValueNote
sha256 66513d2b0ca211cd190997156119713b7b8704a49a28fb9a8328749b9dc2cd45 Sample:MassLogger
md5 e9dee95b8dade115653b772a2793e7b7 Sample:MassLogger
Tags
massloggerinfostealermalwaremediumsha256hash-analizi