MassLogger | Threat Level: medium | Type: Infostealer

Cryptographic Identifiers

SHA256a56ac3a2b9082866257234de1ce3713ee1d9fc7e6f21f8d754f034f81a981cce
MD597ed7f4c50f11cf1cc65199ab8df5c81
File Typejs
Size79.3 KB
First Seen2025-07-19
File NameTROMMEL.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: a56ac3a2b9082866257234de1ce3713ee1d9fc7e6f21f8d754f034f81a981cce
  • MD5: 97ed7f4c50f11cf1cc65199ab8df5c81

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: a56ac3a2b9082866"
        threat_level = "medium"
        first_seen = "2025-07-19"
    condition:
        hash.sha256(0, filesize) == "a56ac3a2b9082866257234de1ce3713ee1d9fc7e6f21f8d754f034f81a981cce"
}

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 a56ac3a2b9082866257234de1ce3713ee1d9fc7e6f21f8d754f034f81a981cce # MD5 97ed7f4c50f11cf1cc65199ab8df5c81
TypeValueNote
sha256 a56ac3a2b9082866257234de1ce3713ee1d9fc7e6f21f8d754f034f81a981cce Sample:MassLogger
md5 97ed7f4c50f11cf1cc65199ab8df5c81 Sample:MassLogger
Tags
massloggerinfostealermalwaremediumsha256hash-analizi