MassLogger | Threat Level: medium | Type: Infostealer

Cryptographic Identifiers

SHA2562377ee9f6b5250ffee5c9ced5d5f358e98e0a210974decfe447d29ae8e0887b9
MD5635ded717f98555e086c7f915c298a8f
File Typevbe
Size1273.0 KB
First Seen2025-12-08
File NameTEKLIF - 01108.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: 2377ee9f6b5250ffee5c9ced5d5f358e98e0a210974decfe447d29ae8e0887b9
  • MD5: 635ded717f98555e086c7f915c298a8f

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: 2377ee9f6b5250ff"
        threat_level = "medium"
        first_seen = "2025-12-08"
    condition:
        hash.sha256(0, filesize) == "2377ee9f6b5250ffee5c9ced5d5f358e98e0a210974decfe447d29ae8e0887b9"
}

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 2377ee9f6b5250ffee5c9ced5d5f358e98e0a210974decfe447d29ae8e0887b9 # MD5 635ded717f98555e086c7f915c298a8f
TypeValueNote
sha256 2377ee9f6b5250ffee5c9ced5d5f358e98e0a210974decfe447d29ae8e0887b9 Sample:MassLogger
md5 635ded717f98555e086c7f915c298a8f Sample:MassLogger
Tags
massloggerinfostealermalwaremediumsha256hash-analizi