MassLogger | Threat Level: medium | Type: Infostealer

Cryptographic Identifiers

SHA25677e1787b6b3d7a3254c4acac3e2d996b9b629ca1c76222c6ad627d4a5880c35c
MD5290f2268c58110991515591e73da7621
File Typejs
Size297.1 KB
First Seen2025-09-18
File NameTRANSFERENCIA.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: 77e1787b6b3d7a3254c4acac3e2d996b9b629ca1c76222c6ad627d4a5880c35c
  • MD5: 290f2268c58110991515591e73da7621

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: 77e1787b6b3d7a32"
        threat_level = "medium"
        first_seen = "2025-09-18"
    condition:
        hash.sha256(0, filesize) == "77e1787b6b3d7a3254c4acac3e2d996b9b629ca1c76222c6ad627d4a5880c35c"
}

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 77e1787b6b3d7a3254c4acac3e2d996b9b629ca1c76222c6ad627d4a5880c35c # MD5 290f2268c58110991515591e73da7621
TypeValueNote
sha256 77e1787b6b3d7a3254c4acac3e2d996b9b629ca1c76222c6ad627d4a5880c35c Sample:MassLogger
md5 290f2268c58110991515591e73da7621 Sample:MassLogger
Tags
massloggerinfostealermalwaremediumsha256hash-analizi