MassLogger | Threat Level: medium | Type: Infostealer

Cryptographic Identifiers

SHA256691b58ed8d5b1f4e29380f47bded6b9efe71fc19cc23229b7ea2fb22b00e86f2
MD5a08142b50e970f9ca024f1f6992a8e06
File Typevbe
Size975.0 KB
First Seen2025-08-06
File Namerck99876.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: 691b58ed8d5b1f4e29380f47bded6b9efe71fc19cc23229b7ea2fb22b00e86f2
  • MD5: a08142b50e970f9ca024f1f6992a8e06

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: 691b58ed8d5b1f4e"
        threat_level = "medium"
        first_seen = "2025-08-06"
    condition:
        hash.sha256(0, filesize) == "691b58ed8d5b1f4e29380f47bded6b9efe71fc19cc23229b7ea2fb22b00e86f2"
}

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 691b58ed8d5b1f4e29380f47bded6b9efe71fc19cc23229b7ea2fb22b00e86f2 # MD5 a08142b50e970f9ca024f1f6992a8e06
TypeValueNote
sha256 691b58ed8d5b1f4e29380f47bded6b9efe71fc19cc23229b7ea2fb22b00e86f2 Sample:MassLogger
md5 a08142b50e970f9ca024f1f6992a8e06 Sample:MassLogger
Tags
massloggerinfostealermalwaremediumsha256hash-analizi