MassLogger | Threat Level: medium | Type: Infostealer

Cryptographic Identifiers

SHA2567efba5bdd57a190663d38a52ff71b525874b832cce859895adf688e9d5c41d7e
MD523b039f0c83b95c35f3ab5c1dbcd79c9
File Typeexe
Size857.0 KB
First Seen2026-02-09
File Nameungziped_file
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: 7efba5bdd57a190663d38a52ff71b525874b832cce859895adf688e9d5c41d7e
  • MD5: 23b039f0c83b95c35f3ab5c1dbcd79c9

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: 7efba5bdd57a1906"
        threat_level = "medium"
        first_seen = "2026-02-09"
    condition:
        hash.sha256(0, filesize) == "7efba5bdd57a190663d38a52ff71b525874b832cce859895adf688e9d5c41d7e"
}

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 7efba5bdd57a190663d38a52ff71b525874b832cce859895adf688e9d5c41d7e # MD5 23b039f0c83b95c35f3ab5c1dbcd79c9
TypeValueNote
sha256 7efba5bdd57a190663d38a52ff71b525874b832cce859895adf688e9d5c41d7e Sample:MassLogger
md5 23b039f0c83b95c35f3ab5c1dbcd79c9 Sample:MassLogger
Tags
massloggerinfostealermalwaremediumsha256hash-analizi