MassLogger | Threat Level: medium | Type: Infostealer

Cryptographic Identifiers

SHA2566a331ed125bffc7fcaf61837164bd52bf3f5788fc468f5a74f477df1b8f4f3c9
MD57341d56ae6d05197fe4d2bda9a2e2c6f
File Typeexe
Size771.0 KB
First Seen2025-09-11
File NameSecuriteInfo.com.Win32.MalwareX-gen.81163741
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: 6a331ed125bffc7fcaf61837164bd52bf3f5788fc468f5a74f477df1b8f4f3c9
  • MD5: 7341d56ae6d05197fe4d2bda9a2e2c6f

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: 6a331ed125bffc7f"
        threat_level = "medium"
        first_seen = "2025-09-11"
    condition:
        hash.sha256(0, filesize) == "6a331ed125bffc7fcaf61837164bd52bf3f5788fc468f5a74f477df1b8f4f3c9"
}

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 6a331ed125bffc7fcaf61837164bd52bf3f5788fc468f5a74f477df1b8f4f3c9 # MD5 7341d56ae6d05197fe4d2bda9a2e2c6f
TypeValueNote
sha256 6a331ed125bffc7fcaf61837164bd52bf3f5788fc468f5a74f477df1b8f4f3c9 Sample:MassLogger
md5 7341d56ae6d05197fe4d2bda9a2e2c6f Sample:MassLogger
Tags
massloggerinfostealermalwaremediumsha256hash-analizi