MassLogger | Threat Level: medium | Type: Infostealer

Cryptographic Identifiers

SHA256c58fd70864da2f3fb9d5f31c327641b12275099264797e8b4f61555ca2be4378
MD563028d403f76da3629eff63a61242f66
File Typevbs
Size1333.9 KB
First Seen2026-01-26
File Name2190012625.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: c58fd70864da2f3fb9d5f31c327641b12275099264797e8b4f61555ca2be4378
  • MD5: 63028d403f76da3629eff63a61242f66

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: c58fd70864da2f3f"
        threat_level = "medium"
        first_seen = "2026-01-26"
    condition:
        hash.sha256(0, filesize) == "c58fd70864da2f3fb9d5f31c327641b12275099264797e8b4f61555ca2be4378"
}

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 c58fd70864da2f3fb9d5f31c327641b12275099264797e8b4f61555ca2be4378 # MD5 63028d403f76da3629eff63a61242f66
TypeValueNote
sha256 c58fd70864da2f3fb9d5f31c327641b12275099264797e8b4f61555ca2be4378 Sample:MassLogger
md5 63028d403f76da3629eff63a61242f66 Sample:MassLogger
Tags
massloggerinfostealermalwaremediumsha256hash-analizi