MassLogger | Threat Level: medium | Type: Infostealer

Cryptographic Identifiers

SHA2566a59a5e9f5a817dad05c7a7adac7f651c5e3c1ecfba81da1271f457e57d4db01
MD5e7c745273caa61a04c41e91dd26f27fd
File Typeexe
Size932.0 KB
First Seen2025-06-10
File Name6a59a5e9f5a817dad05c7a7adac7f651c5e3c1ecfba81da1271f457e57d4db01
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: 6a59a5e9f5a817dad05c7a7adac7f651c5e3c1ecfba81da1271f457e57d4db01
  • MD5: e7c745273caa61a04c41e91dd26f27fd

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: 6a59a5e9f5a817da"
        threat_level = "medium"
        first_seen = "2025-06-10"
    condition:
        hash.sha256(0, filesize) == "6a59a5e9f5a817dad05c7a7adac7f651c5e3c1ecfba81da1271f457e57d4db01"
}

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 6a59a5e9f5a817dad05c7a7adac7f651c5e3c1ecfba81da1271f457e57d4db01 # MD5 e7c745273caa61a04c41e91dd26f27fd
TypeValueNote
sha256 6a59a5e9f5a817dad05c7a7adac7f651c5e3c1ecfba81da1271f457e57d4db01 Sample:MassLogger
md5 e7c745273caa61a04c41e91dd26f27fd Sample:MassLogger
Tags
massloggerinfostealermalwaremediumsha256hash-analizi