Every virus cannot be detected by a signature-based antivirus largely for the following reasons:

* If an attacker has changed the signature of a virus, any signature-based antivirus will not be able to find the virus.
* Any new virus will not be captured by the antivirus, as it will not be on the list in the antivirus database.
* If the virus is not in the database of a signature-based antivirus, it will be virtually impossible for the antivirus to detect that virus.
* If the mutation engine of a polymorphic virus is generating a new encrypted code, this changes the signature of the virus. Therefore, polymorphic viruses cannot be detected by a signature-based antivirus.

Explore More

Waledac, the Geo-Targeted Malware

Malware authors are using IP tracking methods to deliver the latest variant of malware. It’s reported that the malware Waledec sends localized news to the victims using GeoIP technologies. The

Read More

ZoneAlarm Using ”Scareware” to Sell Firewall

ZoneAlarm’s developer is using scareware tactics to force free-version clients into purchasing the full suite. Firewall developer Check Point Software Technologies has come under fire from consumers using the free

Read More

Misconfigured security features or Incorrect use of security

Session cookie is not randomized enoughNumerous applications use a session cookie to maintain the state of a logged in user. The use of authentication to validate the user that has

Read More