MassLogger | Threat Level: medium | Type: Infostealer

Cryptographic Identifiers

SHA25627bc76d9371b4b42a83ee6a8a13359ebbffc5fa956f6f074a2e6bb92a117713b
MD581689097c327c96f0f51b8bf508b8935
File Typeexe
Size518.0 KB
First Seen2025-08-12
File Name27bc76d9371b4b42a83ee6a8a13359ebbffc5fa956f6f074a2e6bb92a117713b
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: 27bc76d9371b4b42a83ee6a8a13359ebbffc5fa956f6f074a2e6bb92a117713b
  • MD5: 81689097c327c96f0f51b8bf508b8935

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: 27bc76d9371b4b42"
        threat_level = "medium"
        first_seen = "2025-08-12"
    condition:
        hash.sha256(0, filesize) == "27bc76d9371b4b42a83ee6a8a13359ebbffc5fa956f6f074a2e6bb92a117713b"
}

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 27bc76d9371b4b42a83ee6a8a13359ebbffc5fa956f6f074a2e6bb92a117713b # MD5 81689097c327c96f0f51b8bf508b8935
TypeValueNote
sha256 27bc76d9371b4b42a83ee6a8a13359ebbffc5fa956f6f074a2e6bb92a117713b Sample:MassLogger
md5 81689097c327c96f0f51b8bf508b8935 Sample:MassLogger
Tags
massloggerinfostealermalwaremediumsha256hash-analizi