MassLogger | Threat Level: medium | Type: Infostealer

Cryptographic Identifiers

SHA256bd1c7fec482e5cae6c29f196953329ee39b3481542738f0b1395392fb9c3ee52
MD5b3b2abde8e4ad332632ba28bc12f6902
File Typeexe
Size704.5 KB
First Seen2025-09-02
File NameERAN SİPARİŞ 1205_xlsx.exe
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: bd1c7fec482e5cae6c29f196953329ee39b3481542738f0b1395392fb9c3ee52
  • MD5: b3b2abde8e4ad332632ba28bc12f6902

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: bd1c7fec482e5cae"
        threat_level = "medium"
        first_seen = "2025-09-02"
    condition:
        hash.sha256(0, filesize) == "bd1c7fec482e5cae6c29f196953329ee39b3481542738f0b1395392fb9c3ee52"
}

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 bd1c7fec482e5cae6c29f196953329ee39b3481542738f0b1395392fb9c3ee52 # MD5 b3b2abde8e4ad332632ba28bc12f6902
TypeValueNote
sha256 bd1c7fec482e5cae6c29f196953329ee39b3481542738f0b1395392fb9c3ee52 Sample:MassLogger
md5 b3b2abde8e4ad332632ba28bc12f6902 Sample:MassLogger
Tags
massloggerinfostealermalwaremediumsha256hash-analizi