MassLogger | Threat Level: medium | Type: Infostealer

Cryptographic Identifiers

SHA2560f3e7c10e425676a7532cf23a846e739d6abdc2e7f83eb0bb4ac4821d98543b6
MD5372f0279279e6c208761a117612c98e9
File Typeexe
Size767.5 KB
First Seen2026-05-08
File Name0f3e7c10e425676a7532cf23a846e739d6abdc2e7f83eb0bb4ac4821d98543b6
Tagsexe, MassLogger

Malware Family: MassLogger

MassLogger, email tabanlı keylogger'dır.

TypeInfostealer
Programming LanguageC#/.NET
Target PlatformWindows
C2 ProtocolSMTP/FTP
PurposeEmail keylogger
First Seen Year2020

Threat Indicators (IOC)

  • SHA256: 0f3e7c10e425676a7532cf23a846e739d6abdc2e7f83eb0bb4ac4821d98543b6
  • MD5: 372f0279279e6c208761a117612c98e9

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: 0f3e7c10e425676a"
        threat_level = "medium"
        first_seen = "2026-05-08"
    condition:
        hash.sha256(0, filesize) == "0f3e7c10e425676a7532cf23a846e739d6abdc2e7f83eb0bb4ac4821d98543b6"
}

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 0f3e7c10e425676a7532cf23a846e739d6abdc2e7f83eb0bb4ac4821d98543b6 # MD5 372f0279279e6c208761a117612c98e9
TypeValueNote
sha256 0f3e7c10e425676a7532cf23a846e739d6abdc2e7f83eb0bb4ac4821d98543b6 Sample:MassLogger
md5 372f0279279e6c208761a117612c98e9 Sample:MassLogger
Tags
massloggerinfostealermalwaremediumsha256hash-analizi