MassLogger | Threat Level: medium | Type: Infostealer

Cryptographic Identifiers

SHA256403bc4d2748b2509bfacbb35909bf6ec6e6ee37ed729533018d57b9b418970fe
MD5490570d5d27db78cdcd548fa99938ea4
File Typeexe
Size749.0 KB
First Seen2025-08-19
File NameSecuriteInfo.com.Trojan.PackedNET.3390.9277.20856
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: 403bc4d2748b2509bfacbb35909bf6ec6e6ee37ed729533018d57b9b418970fe
  • MD5: 490570d5d27db78cdcd548fa99938ea4

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: 403bc4d2748b2509"
        threat_level = "medium"
        first_seen = "2025-08-19"
    condition:
        hash.sha256(0, filesize) == "403bc4d2748b2509bfacbb35909bf6ec6e6ee37ed729533018d57b9b418970fe"
}

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 403bc4d2748b2509bfacbb35909bf6ec6e6ee37ed729533018d57b9b418970fe # MD5 490570d5d27db78cdcd548fa99938ea4
TypeValueNote
sha256 403bc4d2748b2509bfacbb35909bf6ec6e6ee37ed729533018d57b9b418970fe Sample:MassLogger
md5 490570d5d27db78cdcd548fa99938ea4 Sample:MassLogger
Tags
massloggerinfostealermalwaremediumsha256hash-analizi