MassLogger | Threat Level: medium | Type: Infostealer

Cryptographic Identifiers

SHA256990c77e153654af651dd65621067c83122d88812a97d9a093c86459fe39de6f6
MD51e31175ea67e5777763c3178e0978632
File Typeexe
Size513.0 KB
First Seen2025-09-05
File Name990c77e153654af651dd65621067c83122d88812a97d9a093c86459fe39de6f6
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: 990c77e153654af651dd65621067c83122d88812a97d9a093c86459fe39de6f6
  • MD5: 1e31175ea67e5777763c3178e0978632

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: 990c77e153654af6"
        threat_level = "medium"
        first_seen = "2025-09-05"
    condition:
        hash.sha256(0, filesize) == "990c77e153654af651dd65621067c83122d88812a97d9a093c86459fe39de6f6"
}

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 990c77e153654af651dd65621067c83122d88812a97d9a093c86459fe39de6f6 # MD5 1e31175ea67e5777763c3178e0978632
TypeValueNote
sha256 990c77e153654af651dd65621067c83122d88812a97d9a093c86459fe39de6f6 Sample:MassLogger
md5 1e31175ea67e5777763c3178e0978632 Sample:MassLogger
Tags
massloggerinfostealermalwaremediumsha256hash-analizi