MassLogger | Threat Level: medium | Type: Infostealer

Cryptographic Identifiers

SHA25686a4c83d0629495fbfbbcd6df608209d5d873d18e2705dd6dcbca013774f3747
MD5fa79e7e18d6428470d7a305d54ff6347
File Typeexe
Size491.5 KB
First Seen2025-09-05
File Name86a4c83d0629495fbfbbcd6df608209d5d873d18e2705dd6dcbca013774f3747
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: 86a4c83d0629495fbfbbcd6df608209d5d873d18e2705dd6dcbca013774f3747
  • MD5: fa79e7e18d6428470d7a305d54ff6347

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: 86a4c83d0629495f"
        threat_level = "medium"
        first_seen = "2025-09-05"
    condition:
        hash.sha256(0, filesize) == "86a4c83d0629495fbfbbcd6df608209d5d873d18e2705dd6dcbca013774f3747"
}

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 86a4c83d0629495fbfbbcd6df608209d5d873d18e2705dd6dcbca013774f3747 # MD5 fa79e7e18d6428470d7a305d54ff6347
TypeValueNote
sha256 86a4c83d0629495fbfbbcd6df608209d5d873d18e2705dd6dcbca013774f3747 Sample:MassLogger
md5 fa79e7e18d6428470d7a305d54ff6347 Sample:MassLogger
Tags
massloggerinfostealermalwaremediumsha256hash-analizi