MassLogger | Threat Level: medium | Type: Infostealer

Cryptographic Identifiers

SHA2565d17fdb722f2c2113ee1b4d31565ab86f093143449959d930b314f8d6d3a85e4
MD5c1c35ddb01856c8fbc52f5c16c6346ff
File Typejs
Size45.7 KB
First Seen2025-06-25
File Name02-0656755325.js
Tagsjs, 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: 5d17fdb722f2c2113ee1b4d31565ab86f093143449959d930b314f8d6d3a85e4
  • MD5: c1c35ddb01856c8fbc52f5c16c6346ff

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: 5d17fdb722f2c211"
        threat_level = "medium"
        first_seen = "2025-06-25"
    condition:
        hash.sha256(0, filesize) == "5d17fdb722f2c2113ee1b4d31565ab86f093143449959d930b314f8d6d3a85e4"
}

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 5d17fdb722f2c2113ee1b4d31565ab86f093143449959d930b314f8d6d3a85e4 # MD5 c1c35ddb01856c8fbc52f5c16c6346ff
TypeValueNote
sha256 5d17fdb722f2c2113ee1b4d31565ab86f093143449959d930b314f8d6d3a85e4 Sample:MassLogger
md5 c1c35ddb01856c8fbc52f5c16c6346ff Sample:MassLogger
Tags
massloggerinfostealermalwaremediumsha256hash-analizi