MassLogger | Threat Level: medium | Type: Infostealer

Cryptographic Identifiers

SHA2565c923d2f67717ecb73afd4d4133e8aa83f66da21aa9eec2aad5d81b31d646f36
MD5edfdec24e687187ac7ed8d7963e374ea
File Typeexe
Size3307.6 KB
First Seen2025-07-07
File Name5c923d2f67717ecb73afd4d4133e8aa83f66da21aa9eec2aad5d81b31d646f36
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: 5c923d2f67717ecb73afd4d4133e8aa83f66da21aa9eec2aad5d81b31d646f36
  • MD5: edfdec24e687187ac7ed8d7963e374ea

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: 5c923d2f67717ecb"
        threat_level = "medium"
        first_seen = "2025-07-07"
    condition:
        hash.sha256(0, filesize) == "5c923d2f67717ecb73afd4d4133e8aa83f66da21aa9eec2aad5d81b31d646f36"
}

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 5c923d2f67717ecb73afd4d4133e8aa83f66da21aa9eec2aad5d81b31d646f36 # MD5 edfdec24e687187ac7ed8d7963e374ea
TypeValueNote
sha256 5c923d2f67717ecb73afd4d4133e8aa83f66da21aa9eec2aad5d81b31d646f36 Sample:MassLogger
md5 edfdec24e687187ac7ed8d7963e374ea Sample:MassLogger
Tags
massloggerinfostealermalwaremediumsha256hash-analizi