MassLogger | Threat Level: medium | Type: Infostealer

Cryptographic Identifiers

SHA256d83a5731392da27f2092430ba3c9f0407593ce08397060ec662728be0e23c6f7
MD578f3519749691e12d10f495615b94ddf
File Typeexe
Size936.0 KB
First Seen2026-04-01
File Nameungziped_file
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: d83a5731392da27f2092430ba3c9f0407593ce08397060ec662728be0e23c6f7
  • MD5: 78f3519749691e12d10f495615b94ddf

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: d83a5731392da27f"
        threat_level = "medium"
        first_seen = "2026-04-01"
    condition:
        hash.sha256(0, filesize) == "d83a5731392da27f2092430ba3c9f0407593ce08397060ec662728be0e23c6f7"
}

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 d83a5731392da27f2092430ba3c9f0407593ce08397060ec662728be0e23c6f7 # MD5 78f3519749691e12d10f495615b94ddf
TypeValueNote
sha256 d83a5731392da27f2092430ba3c9f0407593ce08397060ec662728be0e23c6f7 Sample:MassLogger
md5 78f3519749691e12d10f495615b94ddf Sample:MassLogger
Tags
massloggerinfostealermalwaremediumsha256hash-analizi