MassLogger | Threat Level: medium | Type: Infostealer

Cryptographic Identifiers

SHA25629a95ae36d1399cf298329d2504b805684036d827e0a2b6bd7588eeb91e9899d
MD5776cffee0640c2ee9e2270776c080187
File Typejs
Size3880.0 KB
First Seen2026-06-15
File Nameoutput_pu2c3nk0.js
Tagsjs, 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: 29a95ae36d1399cf298329d2504b805684036d827e0a2b6bd7588eeb91e9899d
  • MD5: 776cffee0640c2ee9e2270776c080187

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: 29a95ae36d1399cf"
        threat_level = "medium"
        first_seen = "2026-06-15"
    condition:
        hash.sha256(0, filesize) == "29a95ae36d1399cf298329d2504b805684036d827e0a2b6bd7588eeb91e9899d"
}

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 29a95ae36d1399cf298329d2504b805684036d827e0a2b6bd7588eeb91e9899d # MD5 776cffee0640c2ee9e2270776c080187
TypeValueNote
sha256 29a95ae36d1399cf298329d2504b805684036d827e0a2b6bd7588eeb91e9899d Sample:MassLogger
md5 776cffee0640c2ee9e2270776c080187 Sample:MassLogger
Tags
massloggerinfostealermalwaremediumsha256hash-analizi