MassLogger | Threat Level: medium | Type: Infostealer

Cryptographic Identifiers

SHA256fab6e3a7f39a59f9cc7e909661048841701f6b65aacf9154fcfa8341dbbfef37
MD5a7f25a300791c2739ff8998e78b1c102
File Typeexe
Size586.0 KB
First Seen2025-10-10
File Namefab6e3a7f39a59f9cc7e909661048841701f6b65aacf9154fcfa8341dbbfef37
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: fab6e3a7f39a59f9cc7e909661048841701f6b65aacf9154fcfa8341dbbfef37
  • MD5: a7f25a300791c2739ff8998e78b1c102

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: fab6e3a7f39a59f9"
        threat_level = "medium"
        first_seen = "2025-10-10"
    condition:
        hash.sha256(0, filesize) == "fab6e3a7f39a59f9cc7e909661048841701f6b65aacf9154fcfa8341dbbfef37"
}

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 fab6e3a7f39a59f9cc7e909661048841701f6b65aacf9154fcfa8341dbbfef37 # MD5 a7f25a300791c2739ff8998e78b1c102
TypeValueNote
sha256 fab6e3a7f39a59f9cc7e909661048841701f6b65aacf9154fcfa8341dbbfef37 Sample:MassLogger
md5 a7f25a300791c2739ff8998e78b1c102 Sample:MassLogger
Tags
massloggerinfostealermalwaremediumsha256hash-analizi