MassLogger | Threat Level: medium | Type: Infostealer

Cryptographic Identifiers

SHA256bc3a0cd035b704638331c213f3dc30793abd9275341abbbee0f5f4f3f27b1c60
MD5e292258774d7d8fefe4f955db1e62a77
File Typeexe
Size917.0 KB
First Seen2025-12-08
File Namebc3a0cd035b704638331c213f3dc30793abd9275341abbbee0f5f4f3f27b1c60
Tagsexe, MassLogger

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: bc3a0cd035b704638331c213f3dc30793abd9275341abbbee0f5f4f3f27b1c60
  • MD5: e292258774d7d8fefe4f955db1e62a77

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: bc3a0cd035b70463"
        threat_level = "medium"
        first_seen = "2025-12-08"
    condition:
        hash.sha256(0, filesize) == "bc3a0cd035b704638331c213f3dc30793abd9275341abbbee0f5f4f3f27b1c60"
}

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 bc3a0cd035b704638331c213f3dc30793abd9275341abbbee0f5f4f3f27b1c60 # MD5 e292258774d7d8fefe4f955db1e62a77
TypeValueNote
sha256 bc3a0cd035b704638331c213f3dc30793abd9275341abbbee0f5f4f3f27b1c60 Sample:MassLogger
md5 e292258774d7d8fefe4f955db1e62a77 Sample:MassLogger
Tags
massloggerinfostealermalwaremediumsha256hash-analizi