MassLogger | Threat Level: medium | Type: Infostealer

Cryptographic Identifiers

SHA2561927fc33bd4f6bd6cf2c0f2408dd98c32c6f31898dabea6f692f58dece187e6e
MD56b3256805f492d561e2c32310f4fa8f6
File Typeexe
Size746.0 KB
First Seen2025-09-08
File NameSecuriteInfo.com.Win32.MalwareX-gen.27993692
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: 1927fc33bd4f6bd6cf2c0f2408dd98c32c6f31898dabea6f692f58dece187e6e
  • MD5: 6b3256805f492d561e2c32310f4fa8f6

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: 1927fc33bd4f6bd6"
        threat_level = "medium"
        first_seen = "2025-09-08"
    condition:
        hash.sha256(0, filesize) == "1927fc33bd4f6bd6cf2c0f2408dd98c32c6f31898dabea6f692f58dece187e6e"
}

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 1927fc33bd4f6bd6cf2c0f2408dd98c32c6f31898dabea6f692f58dece187e6e # MD5 6b3256805f492d561e2c32310f4fa8f6
TypeValueNote
sha256 1927fc33bd4f6bd6cf2c0f2408dd98c32c6f31898dabea6f692f58dece187e6e Sample:MassLogger
md5 6b3256805f492d561e2c32310f4fa8f6 Sample:MassLogger
Tags
massloggerinfostealermalwaremediumsha256hash-analizi