MassLogger | Threat Level: medium | Type: Infostealer

Cryptographic Identifiers

SHA256df73e4e1f729cb4449d26f1f7baa60393cd1d9693d477e05626cc49a2978afc6
MD50877354b124fdb59839459e16608f969
File Typevbe
Size543.4 KB
First Seen2025-10-10
File NameCOT_1008.VBE
TagsMassLogger, vbe

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: df73e4e1f729cb4449d26f1f7baa60393cd1d9693d477e05626cc49a2978afc6
  • MD5: 0877354b124fdb59839459e16608f969

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: df73e4e1f729cb44"
        threat_level = "medium"
        first_seen = "2025-10-10"
    condition:
        hash.sha256(0, filesize) == "df73e4e1f729cb4449d26f1f7baa60393cd1d9693d477e05626cc49a2978afc6"
}

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 df73e4e1f729cb4449d26f1f7baa60393cd1d9693d477e05626cc49a2978afc6 # MD5 0877354b124fdb59839459e16608f969
TypeValueNote
sha256 df73e4e1f729cb4449d26f1f7baa60393cd1d9693d477e05626cc49a2978afc6 Sample:MassLogger
md5 0877354b124fdb59839459e16608f969 Sample:MassLogger
Tags
massloggerinfostealermalwaremediumsha256hash-analizi