The symptoms and hazards of worms and the characteristics are:

Worms are self-replicating and spread over the web, usually without human intervention. Once a worm has invaded and taken full control of a computer, it hosts that machine to scan and infect other computers.

1. Characteristics. 1. Strong independence.

The worm does not need a host program, it is an independent program or **, so it avoids being restrained by the host program, and can run independently without relying on the host program, so as to actively carry out attacks.

2. Take advantage of vulnerabilities to actively attack.

Since it is not limited by the host program, the worm can exploit various vulnerabilities in the operating system for active attacks.

3. Spread faster and wider.

Worms are more contagious than traditional viruses in that they not only infect the local computer, but also infect all servers and clients in the network based on the local computer.

4. Make tracking more difficult.

Once a worm has infected most systems, an attacker can launch a variety of other attack methods against a target site and hide the attacker's location through the worm network, making it very difficult to catch the attacker.

2. Countermeasures.

1. Choose the right antivirus software.

The development of network worms has made the "file-level real-time monitoring system" of traditional antivirus software outdated, and antivirus software must develop to real-time monitoring of memory and email.

2. Update the virus database frequently.

Antivirus software is based on the signature code of the virus, and viruses emerge every day, especially in the Internet era, worms spread fast and have many variants, so the virus database must be updated at any time in order to be able to detect and kill the latest viruses.

3. Improve the awareness of anti-virus.

Don't click on unfamiliar sites easily, there may be malicious intent in them**.

4. Don't check strange emails at will, especially emails with attachments.

Since some virus emails can be automatically executed by exploiting the vulnerabilities of IE and Outlook, computer users need to upgrade IE and Outlook programs, as well as other commonly used applications. The latest worm, the "Masked Guest", has been discovered and can leak user privacy.

A worm is a common type of computer virus. It is replicated and spread using the Internet, and the route of infection is through the Internet and e-mail. It can distribute copies of its own functions or parts of it to other computer systems.

Note that, unlike viruses in general, worms do not need to attach themselves to the host program, and worms are generally spread through the Port 1434 vulnerability. The more famous one is the panda incense burning virus.

It differs from a common virus in the following ways:

While common viruses infect files on computers, worms infect all computers on the Internet.

The propagation and propagation of common viruses requires the replication of infected files, and the propagation of worms does not require the replication of files to spread and multiply in large quantities.

Ordinary viruses cannot control the computer, but worms can control the computer to achieve the function of uploading and copying file information.

A computer virus is a set of computer instructions or programs inserted by the compiler into a computer program that destroys computer functions or data, can affect the use of the computer, and can replicate itself.

Computer viruses are transmissible, hidden, infectious, latent, excitable, expressive, or destructive. The life cycle of a computer virus: development period, infectious period, incubation period, attack period, discovery period, digestion period, and extinction period.

A computer virus is a program that executes code. Just like biological viruses, they have the characteristics of biological viruses such as self-reproduction, mutual infection, and activation and regeneration. Computer viruses have a unique ability to replicate, and they can spread quickly and often hard**.

They can attach themselves to various types of files, and they spread along with files as they are copied or transferred from one user to another.

Infected computers can form a large "botnet" that can be used by virus authors to launch any attack.

It can be used to launch attacks, and it can also be used to monitor. It can corrupt files and also automate** emails.

Eat your most important documents.

Characteristics: When the virus strikes, a bug-like strip appears on the screen, devouring and transforming the letters on the screen. A worm is a self-contained program (or set of programs) that can transmit copies of its own functionality or parts of itself to other computer systems (usually over a network connection).

A worm is a self-contained program (or set of programs) that can spread copies of its own functionality or parts of it to other computer systems (usually over a network connection). Note that, unlike viruses in general, worms do not need to attach themselves to the host program, and there are two types of worms: host worms and network worms.

The host computer worm is completely contained in the computer on which they are running, and uses a network connection to copy itself only to other computers, and the host computer worm terminates itself when it adds its copy to another host (so that at any given moment, only one copy of the worm is running), which is sometimes called"Hare"Worms are generally spread through the Port 1434 vulnerability.