MassLogger | Threat Level: medium | Type: Infostealer

Cryptographic Identifiers

SHA256dc55c5c1535fdf16c7e36ac490fde1fbe20bdda6fe4994559246772cd03ac4f1
MD597525b75fa62765b16a4a0713816fffa
File Typeexe
Size704.5 KB
First Seen2025-06-10
File Namedc55c5c1535fdf16c7e36ac490fde1fbe20bdda6fe4994559246772cd03ac4f1
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: dc55c5c1535fdf16c7e36ac490fde1fbe20bdda6fe4994559246772cd03ac4f1
  • MD5: 97525b75fa62765b16a4a0713816fffa

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: dc55c5c1535fdf16"
        threat_level = "medium"
        first_seen = "2025-06-10"
    condition:
        hash.sha256(0, filesize) == "dc55c5c1535fdf16c7e36ac490fde1fbe20bdda6fe4994559246772cd03ac4f1"
}

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 dc55c5c1535fdf16c7e36ac490fde1fbe20bdda6fe4994559246772cd03ac4f1 # MD5 97525b75fa62765b16a4a0713816fffa
TypeValueNote
sha256 dc55c5c1535fdf16c7e36ac490fde1fbe20bdda6fe4994559246772cd03ac4f1 Sample:MassLogger
md5 97525b75fa62765b16a4a0713816fffa Sample:MassLogger
Tags
massloggerinfostealermalwaremediumsha256hash-analizi