MassLogger | Threat Level: medium | Type: Infostealer

Cryptographic Identifiers

SHA25652040a475c69087fe6d13065f456a5208f2be0f2c9d5b89b5858433080865c9a
MD5cf5620364a0a5d551ed668156863436c
File Typevbs
Size36.3 KB
First Seen2025-06-28
File NamePO_899764..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: 52040a475c69087fe6d13065f456a5208f2be0f2c9d5b89b5858433080865c9a
  • MD5: cf5620364a0a5d551ed668156863436c

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: 52040a475c69087f"
        threat_level = "medium"
        first_seen = "2025-06-28"
    condition:
        hash.sha256(0, filesize) == "52040a475c69087fe6d13065f456a5208f2be0f2c9d5b89b5858433080865c9a"
}

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 52040a475c69087fe6d13065f456a5208f2be0f2c9d5b89b5858433080865c9a # MD5 cf5620364a0a5d551ed668156863436c
TypeValueNote
sha256 52040a475c69087fe6d13065f456a5208f2be0f2c9d5b89b5858433080865c9a Sample:MassLogger
md5 cf5620364a0a5d551ed668156863436c Sample:MassLogger
Tags
massloggerinfostealermalwaremediumsha256hash-analizi