MassLogger | Threat Level: medium | Type: Infostealer

Cryptographic Identifiers

SHA256fffc8303e4bd1398f4d558c13772e70e52e9dff491cb2f9a20956982dcfaf6c1
MD5bac0efe7014c630b68af9d1ea289ac02
File Typeexe
Size860.5 KB
First Seen2026-05-08
File Namefffc8303e4bd1398f4d558c13772e70e52e9dff491cb2f9a20956982dcfaf6c1
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: fffc8303e4bd1398f4d558c13772e70e52e9dff491cb2f9a20956982dcfaf6c1
  • MD5: bac0efe7014c630b68af9d1ea289ac02

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: fffc8303e4bd1398"
        threat_level = "medium"
        first_seen = "2026-05-08"
    condition:
        hash.sha256(0, filesize) == "fffc8303e4bd1398f4d558c13772e70e52e9dff491cb2f9a20956982dcfaf6c1"
}

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 fffc8303e4bd1398f4d558c13772e70e52e9dff491cb2f9a20956982dcfaf6c1 # MD5 bac0efe7014c630b68af9d1ea289ac02
TypeValueNote
sha256 fffc8303e4bd1398f4d558c13772e70e52e9dff491cb2f9a20956982dcfaf6c1 Sample:MassLogger
md5 bac0efe7014c630b68af9d1ea289ac02 Sample:MassLogger
Tags
massloggerinfostealermalwaremediumsha256hash-analizi