MassLogger | Threat Level: medium | Type: Infostealer

Cryptographic Identifiers

SHA2564254a216aec74ff8c5bbb58e5408ecd051b2966ed1a5ffab12c1e5eb2756fd8b
MD5c470e797329a81a32a496e39367da950
File Typejs
Size2385.8 KB
First Seen2026-06-11
File Name(RFQ 100401-2026-PTSC-GHC-03) -035.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: 4254a216aec74ff8c5bbb58e5408ecd051b2966ed1a5ffab12c1e5eb2756fd8b
  • MD5: c470e797329a81a32a496e39367da950

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: 4254a216aec74ff8"
        threat_level = "medium"
        first_seen = "2026-06-11"
    condition:
        hash.sha256(0, filesize) == "4254a216aec74ff8c5bbb58e5408ecd051b2966ed1a5ffab12c1e5eb2756fd8b"
}

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 4254a216aec74ff8c5bbb58e5408ecd051b2966ed1a5ffab12c1e5eb2756fd8b # MD5 c470e797329a81a32a496e39367da950
TypeValueNote
sha256 4254a216aec74ff8c5bbb58e5408ecd051b2966ed1a5ffab12c1e5eb2756fd8b Sample:MassLogger
md5 c470e797329a81a32a496e39367da950 Sample:MassLogger
Tags
massloggerinfostealermalwaremediumsha256hash-analizi