Trojan Horse – Mythology or Reality ?

In Greek Mythology, the Trojan Horse was a seemingly innocuous but treacherous gift from the Greeks to the Trojans. During the siege of Troy, an enormous wooden horse was left by the Greek army outside the gates of the city. The Greeks had sailed away as if they had retreated. The Trojans, believing the horse to be a religious offering, brought it into the city. Greek soldiers then emerged from their hiding place within the hollow horse and opened the city gates to enable the rest of the Greek army to enter and capture the city. Continue reading “Trojan Horse – Mythology or Reality ?”

Comparison: Virus, Warm, Adware, Spyware, Trojan

We have all encountered terms like virus, warms, spyware etc many many times in the internet “jungle” without actually distinguishing between them. In this post I will try to define and compare all these malware threats that flow around the computer and internet worlds.

  • Virus: A virus is a malware program that is loaded on your computer without your knowledge, with the intent of doing some damage to your system. It normally attaches itself to another program or data file in order to spread and reproduce itself in other areas of the computer without the knowledge of the user. Normally a virus enters your computer through a spam email which has attachments (pictures or files) or by downloading infected programs from malicious sites. A virus can damage files or cause your computer to behave strangely.
  • Warm: Warms are memory-resident malware threats that can spread across networks by exploiting possible Vulnerabilities in the TCP/IP stack implementation of the OS and/or specific applications. They load themselves into the memory of a remote system and then execute themselves … all without ever being written to a disk. A warm therefore can live on its own and propagate by copying itself from one computer to another. Worms can harm a network, can consume tremendous bandwidth, and can shut a computer down.
  • The difference between viruses and worms is that a virus cannot replicate itself like a worm, and it usually affects the computer it has invaded. A worm acts autonomously, and uses a computer network in order to multiply itself and to send copies of itself to other systems. A virus needs a user action (e.g download of infected file, run a program etc) in order to propagate and spread itself. Continue reading “Comparison: Virus, Warm, Adware, Spyware, Trojan”