MassLogger | Threat Level: medium | Type: Infostealer

Cryptographic Identifiers

SHA256fbb2b930a5ee2aa5b2b70e7d72af82982dec10cb8ac3b8f8a64ab3be2d0b5edb
MD56dbb8752f59171b8056302eb193d7340
File Typevbe
Size549.5 KB
First Seen2025-10-20
File NameDekont.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: fbb2b930a5ee2aa5b2b70e7d72af82982dec10cb8ac3b8f8a64ab3be2d0b5edb
  • MD5: 6dbb8752f59171b8056302eb193d7340

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: fbb2b930a5ee2aa5"
        threat_level = "medium"
        first_seen = "2025-10-20"
    condition:
        hash.sha256(0, filesize) == "fbb2b930a5ee2aa5b2b70e7d72af82982dec10cb8ac3b8f8a64ab3be2d0b5edb"
}

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 fbb2b930a5ee2aa5b2b70e7d72af82982dec10cb8ac3b8f8a64ab3be2d0b5edb # MD5 6dbb8752f59171b8056302eb193d7340
TypeValueNote
sha256 fbb2b930a5ee2aa5b2b70e7d72af82982dec10cb8ac3b8f8a64ab3be2d0b5edb Sample:MassLogger
md5 6dbb8752f59171b8056302eb193d7340 Sample:MassLogger
Tags
massloggerinfostealermalwaremediumsha256hash-analizi