Ransomware


What is ransomware?

There are two types of ransomware: crypto-ransomware that encrypts files (rendering them unreadable), and screen-locking ransomware that locks the home screen. In both cases, the authors of malicious software demand a ransom from its victims to access the files and device.


How ransomware spreads

Ransomware is frequently spread via email: a cybercriminal sends an email with an attachment. The unsuspecting user opens the document (or java script file), which looks like gibberish. The document recommends enabling macros “if the data encoding is incorrect,” which, of course, it is by design. Enabling macros allows the ransomware to be secretly downloaded onto computers via a drive-by download.


What it is after

Crypto-ransomware then proceeds to encrypt all files it finds (images, videos, office files…). It even scrambles data on removable drives plugged in at the time. Now that all files are encrypted, the ransomware asks for payment in exchange for unscrambling them. Payment is frequently demanded in bitcoin and can cost up to several thousands of dollars. In the case of screen-locking ransomware, the malware locks the home screen – preventing users from accessing their devices – and similarly demands payment for regaining access.


Known cases

CryptoLocker, FBI Ransomware, and Locky are three cases of widespread ransomware that have infected millions of victims.


How to protect yourself from ransomware

We recommend you back up your data on a regular basis, so that if your data is ever encrypted, you still have access to them and you can wipe your hard drive if need be. To detect and block ransomware, use security software such as Avira Free Antivirus.

Important: Your current Windows version is outdated and no longer supported.
For your security, we recommend switching to Windows 10 before downloading Avira software.
Update your Windows version here.
Wichtig: Ihre Windows-Version ist veraltet und wird nicht mehr unterstützt.
Zu Ihrer Sicherheit empfehlen wir Ihnen den Wechsel zu Windows 10 vor dem Download unserer Software.
Hier können Sie Ihr Windows aktualisieren.
Important: Votre version actuelle de Windows est obsolète et n’est plus prise en charge.
Pour votre sécurité, nous vous conseillons de passer à Windows 10 avant de télécharger le logiciel Avira.
Mettez à jour votre version de Windows ici.
Importante: Tu versión actual de Windows está desactualizada y ya no es compatible.
Por tu seguridad, te recomendamos que instales Windows 10 antes de descargar la solución de Avira.
Actualiza aquí tu versión de Windows.
Importante: La tua attuale versione di Windows è obsoleta e non è più supportata.
Per la tua sicurezza, ti consigliamo di passare a Windows 10 prima di scaricare i software Avira.
Aggiorna la tua versione di Windows qui.
Importante: Sua versão atual do Windows está desatualizada e não tem mais suporte.
Para sua segurança, recomendamos que troque para o Windows 10 antes de baixar o software da Avira.
Atualize sua versão do Windows aqui.
Важно: ваша версия Windows устарела и больше не поддерживается.
Из соображений безопасности перед загрузкой ПО Avira мы рекомендуем перейти на Windows 10.
Обновить Windows вы можете здесь.
Belangrijk: Uw huidige versie van Windows is verouderd en wordt niet meer ondersteund.
Voor uw veiligheid adviseren wij u om over te stappen op Windows 10 voordat u de Avira-software downloadt.
Update uw Windows-versie hier.
Önemli: Kullanmakta olduğunuz Windows sürümü eski ve artık desteklenmiyor.
Güvenliğiniz için Avira yazılımını indirmeden önce Windows 10 sürümüne yükseltmenizi öneririz.
Windows sürümünü buradan güncelleyin.
重要 : 現在お使いの Windows バージョンは古いため、サポートされなくなりました。
安全のため、Avira ソフトウェアをダウンロードする前に Windows 10 に切り替えることをお勧めします。
こちらより Windows バージョンをアップデートしてください
重要信息 : 您当前的 Windows 版本已过时,并且不再受支持。
为了安全起见,我们建议您在下载 Avira 软件之前切换到 Windows 10。
在此升级您的 Windows 版本
重要資訊 : 您當前的 Windows 版本已過時,並且不再受支援。
為了安全起見,我們建議您在下載 Avira 軟體之前切換到 Windows 10。
在此升級您的 Windows 版本