MassLogger | Threat Level: medium | Type: Infostealer

Cryptographic Identifiers

SHA25649b49c2e3d68568488e53a685125f97214feed4690627248266500cff5764c14
MD58fadd91af5178aca82493a1260ebd451
File Typevbs
Size619.7 KB
First Seen2025-07-16
File NameJUNE DATAS.vbs
TagsMassLogger, vbs

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: 49b49c2e3d68568488e53a685125f97214feed4690627248266500cff5764c14
  • MD5: 8fadd91af5178aca82493a1260ebd451

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: 49b49c2e3d685684"
        threat_level = "medium"
        first_seen = "2025-07-16"
    condition:
        hash.sha256(0, filesize) == "49b49c2e3d68568488e53a685125f97214feed4690627248266500cff5764c14"
}

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 49b49c2e3d68568488e53a685125f97214feed4690627248266500cff5764c14 # MD5 8fadd91af5178aca82493a1260ebd451
TypeValueNote
sha256 49b49c2e3d68568488e53a685125f97214feed4690627248266500cff5764c14 Sample:MassLogger
md5 8fadd91af5178aca82493a1260ebd451 Sample:MassLogger
Tags
massloggerinfostealermalwaremediumsha256hash-analizi