MassLogger | Threat Level: medium | Type: Infostealer

Cryptographic Identifiers

SHA256f13f245c6e53e8837e29c70a7dee1a9382b6502b20478f6ecc23990c5c09ca7c
MD57a7260a7c0f92d2c986500cc7b0e13fc
File Typeexe
Size674.0 KB
First Seen2025-10-06
File NameMT103-374873-PDF.exe
Tagsexe, 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: f13f245c6e53e8837e29c70a7dee1a9382b6502b20478f6ecc23990c5c09ca7c
  • MD5: 7a7260a7c0f92d2c986500cc7b0e13fc

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: f13f245c6e53e883"
        threat_level = "medium"
        first_seen = "2025-10-06"
    condition:
        hash.sha256(0, filesize) == "f13f245c6e53e8837e29c70a7dee1a9382b6502b20478f6ecc23990c5c09ca7c"
}

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 f13f245c6e53e8837e29c70a7dee1a9382b6502b20478f6ecc23990c5c09ca7c # MD5 7a7260a7c0f92d2c986500cc7b0e13fc
TypeValueNote
sha256 f13f245c6e53e8837e29c70a7dee1a9382b6502b20478f6ecc23990c5c09ca7c Sample:MassLogger
md5 7a7260a7c0f92d2c986500cc7b0e13fc Sample:MassLogger
Tags
massloggerinfostealermalwaremediumsha256hash-analizi