MassLogger | Threat Level: medium | Type: Infostealer

Cryptographic Identifiers

SHA25676771c0cfe10218fc1e8ba4ad2adfde996e1f5fd4b9987294da57e5b2a496e50
MD50fde1288ef288731aef0855b08be049a
File Typejs
Size7932.0 KB
First Seen2026-06-21
File NameRFQ-MRF-889-MHS-TLQ-520 # 2600260001.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: 76771c0cfe10218fc1e8ba4ad2adfde996e1f5fd4b9987294da57e5b2a496e50
  • MD5: 0fde1288ef288731aef0855b08be049a

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: 76771c0cfe10218f"
        threat_level = "medium"
        first_seen = "2026-06-21"
    condition:
        hash.sha256(0, filesize) == "76771c0cfe10218fc1e8ba4ad2adfde996e1f5fd4b9987294da57e5b2a496e50"
}

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 76771c0cfe10218fc1e8ba4ad2adfde996e1f5fd4b9987294da57e5b2a496e50 # MD5 0fde1288ef288731aef0855b08be049a
TypeValueNote
sha256 76771c0cfe10218fc1e8ba4ad2adfde996e1f5fd4b9987294da57e5b2a496e50 Sample:MassLogger
md5 0fde1288ef288731aef0855b08be049a Sample:MassLogger
Tags
massloggerinfostealermalwaremediumsha256hash-analizi