MassLogger | Threat Level: medium | Type: Infostealer

Cryptographic Identifiers

SHA256e943f16d0fdb06da7d7ea64e24b1c439f1d4a85380a5551c1cec8892e99d5ca4
MD5a9da659b46be3d9df119cdaf92c2ed83
File Typeexe
Size846.0 KB
First Seen2026-05-08
File Namee943f16d0fdb06da7d7ea64e24b1c439f1d4a85380a5551c1cec8892e99d5ca4
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: e943f16d0fdb06da7d7ea64e24b1c439f1d4a85380a5551c1cec8892e99d5ca4
  • MD5: a9da659b46be3d9df119cdaf92c2ed83

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: e943f16d0fdb06da"
        threat_level = "medium"
        first_seen = "2026-05-08"
    condition:
        hash.sha256(0, filesize) == "e943f16d0fdb06da7d7ea64e24b1c439f1d4a85380a5551c1cec8892e99d5ca4"
}

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 e943f16d0fdb06da7d7ea64e24b1c439f1d4a85380a5551c1cec8892e99d5ca4 # MD5 a9da659b46be3d9df119cdaf92c2ed83
TypeValueNote
sha256 e943f16d0fdb06da7d7ea64e24b1c439f1d4a85380a5551c1cec8892e99d5ca4 Sample:MassLogger
md5 a9da659b46be3d9df119cdaf92c2ed83 Sample:MassLogger
Tags
massloggerinfostealermalwaremediumsha256hash-analizi