2010年8月10日星期二

Trojans prepare for the constructor function

Kaspersky alert you should note this week: "constructor function Trojan" virus. This virus uses UPACK packers technology to protect themselves. Once the user of this virus infection, the virus infected computer system in the background to run IE (browser) process, IE (browser) program will monitor the remote server command embedded in the virus itself but also the infected computer users Desktop process. At the same time, "constructor function Trojan" virus to a specific virus, the server will automatically download the files to a large number of virus infected computer, these files are automatically downloaded most of Daohao trojan virus, spyware and so on, to believe that the virus infected users will be immeasurable economic loss of information.

We recommend that you update the virus database for killing as quickly as possible to avoid unnecessary losses.

1, a good security practice, do not open suspicious mail and suspicious websites;
2, do not chat freely to receive and send documents over the web link to fight development;
3. Use of removable media is best to use when using the right mouse button to open, if necessary, first scan;
4, there are many loopholes in the spread of the virus using the system, so playing the whole patch to the system is also very important;
5, as soon as possible to install Kaspersky Internet Security suite, and open the full protection of real-time monitoring function;
6, based machine administrator password to set a more complex password, to prevent virus spread through the password-guessing, the best combination of digits and letters is the password;
7, do not download software from unreliable sources, because the software is likely a virus.

Beware of e-mail behind the "killer"

Virus Name: Trojan-Downloader.Win32.Agent.wps (downloader variant SPW), the virus type: Trojan, hazard rating: ★ ★ ★ ★ ★, affected platforms: WIN9X/ME/NT/2000/XP/2003

This document uses upack packers, once infected, it will create a disk in the system random number and letter combinations for the name of the hidden folder, and try to connect to the network, once connected, it will quickly connect to the server through port 80 specified Download a large number of Daohao Trojan to this folder, and try to run them, to steal the user's game account and password information. Kaspersky has entirely killing the virus.

Experts suggest:
1. Not to open suspicious mail and suspicious websites.
2. Do not talk at random to receive the file transfer tools and website links.
3. Use of removable media is best to use when using the right mouse button to open, if necessary, must first be scanned.
4. Now there are many loopholes in the spread of the virus using the system, so playing the whole patch to the system is also critical.
5. Install anti-virus software, a professional upgrade to the latest version, and open real-time monitoring.
6. Based machine administrator account to set up a more complex password.

Attention! "IMG-WMF exploits device"

Note: "IMG-WMF exploits device" virus. Once a computer is "IMG-WMF exploits device" virus infection, the virus will be the end of computer antivirus software, while it will also set up video hijack key, so that future users can install and run antivirus software properly. Followed by "IMG-WMF exploits device" virus to the specified server to download a Notepad file, this file contains a large number of Trojan download, virus process will read the address and automatically download the virus file to the system running, stealing take the user's account information.

For your computer security, friendship to remind you:
1, for the spread of the virus to exploit system vulnerabilities to the system to play the whole patch is very important;
2, Kaspersky Internet Security suite installed as soon as possible, and open the full protection of real-time monitoring function;
3, based machine administrator password set the password more complex, the best combination of digits and letters is the password;
4, do not download software from unreliable sources, because the software is likely a virus.

"U disk worm downloader" frequent attacks on the user variant

Xinhua Beijing on Nov. 28 Reuters called "U disk worm downloader variant EYK (Worm.Win32.Autorun.eyk)" The virus is particularly noteworthy this week it through U disk storage devices such as mobile communication, will download a large number of Trojan viruses, to the user great security risk. Therefore, anti-virus, anti-trojan Rising broadcast week (2008.12.01-12.07) to its attention this week as the virus alert level for the ★ ★ ★.

"U disk worm downloader variant EYK" is a worm. The virus will run in the directory system generates its own named svchost. exe and the release of the file name winlogon. exe file, and then start the process of both programs, the virus process using the two-guard functions, if one process is over, then another process will execute the shutdown command, to avoid killing. Viruses from time to time in letter written to the file inside svchost. exe and autorun. inf, to double-click the drive letter to run a virus and the use of mobile hard disk for virus transmission purposes; modify the registry key in order to achieve the purpose at startup, and finally a large number of Trojan will download to the user computer to perform, to the enormous computer users security risks.

In this regard, experts recommend that users: 1, install card access security assistant 6.0 bug fixes, to prevent infection of such viruses; 2, to develop good surfing habits, do not open a bad site, not free to download and install a suspicious plug; 3 , install antivirus software upgrade to the latest version of 2008, regular anti-virus and open real-time monitoring function, prevent the virus from infected computers; 4, time to set a system restore point and back up important files, and to online banking, online games, QQ and other important software to "safe account" in order to prevent the virus to steal game account, password and other personal information.

2010年8月8日星期日

Leap-A/Oompa-A

Perhaps you have seen the Apple ads, which have Justin . Long play "I am Apple," and John . Hochman played "I'm the computer." Hochman play computer crash because of a virus, we should be grateful to Al . Jankovic reminds us that "stinking cheese" against the virus

He also pointed out that there are more than 100,000 kinds of virus attacks your computer. And Justin says, that the virus only infects a computer with Windows systems, Apple Computer does not work.

In most cases, these things right. Apple introduced its "do not open a safe" design philosophy, to avoid a lot of harm to the virus. Apple's hardware and operating system is essentially a closed system, because they are Apple's own products. Thus it can be said of Apple's operating system is a "closed" system. Has been in the home computer market, Apple occupies the second place, but there is a great distance away from the PC great. One can imagine, for Apple Computer viruses can not produce as big as Windows viruses harm.

But this did not prevent the emergence of an Apple hackers. In 2006, Leap-A virus, also known as Oompa-A viruses. It uses Apple's iChat chat program between the spread. When Apple computer virus, it will automatically search for iChat's contact list to send information to one of the friends, the message looks like with an incomplete picture of the damaged jpeg attachment.

Virus will not have computer generated much harm, it proves that even Apple may also be toxic. With the Mac's more and more popular, more and more viruses for Mac will appear.

Sasser and Netsky virus

Sometimes virus makers can escape easily traced. However, the virus may also spread through the back way to find the source. Sasser (Sasser) and Netsky (NetSky) was thus discovered.

A 17-year-old named Sven Jaschan created both German and they spread the virus to the network. Although the two methods of virus is completely different, but similar to the code so that experts have determined that they were from one hand.

Sasser virus infection of computer vulnerabilities of Microsoft. Unlike other worms, it does not spread through the mail, if the computer infected with the virus, the virus will automatically look for loopholes in computer systems, and remote control that computer to download the virus. The virus can search for any IP addresses to find potential victims. The virus will modify the user's operating system so that users can not shut down, only force power.

Netsky virus spread through e-mail and network. It also e-mail address spoofing, and accessories for self-replication [Data: CERT]. When the virus spread, will also carry out denial-of-service attacks (DoS), thereby control the bandwidth resources. Sophos experts believe that Netsky and its variants infected once on the Internet 1 / 4 computer [data: Wagner].

Sven Jaschan did not go to jail, but was sentenced to 1 year and 3 months of probation, because he was under the age of 18 years, which escaped.

Until now, we look back at all those viruses attack computers running Windows system. This does not mean that Apple machines can be free from viruses. Here we will experience a kind of virus against the Mac.

Black Hat

In Oz, you can expect to find a good witch and bad witch. Similarly, the hacker community has good and bad. Those who create viruses and hackers to find vulnerabilities is also called "black hat." Many hackers at Black Hat or Defcon hackers conference to discuss the impact and how to use loopholes to the system intrusion.

Nuowei Ge virus

This Nuowei Ge (Novarg) virus, also known as MyDoom, it also would leave a back door in the user's operating system. The virus was later produced many variants, the initial Nuowei Ge virus has two triggers.

The first program in the February 1, 2004 start to launch denial-of-service attack (DoS), the second program in the February 12, 2004 to stop the virus self-replication. But after a virus attack to stop, leaving the back doors still have harmful [Data: Symantec].

Soon after, another outbreak of the virus to several search engines a mortal blow. And other viruses, Nuowei Ge virus infected users computer search for the contact list, then send the message. In addition, it will send search requests to search engines to search the mailbox and then send e-mail. This led to Google like search engine receive millions of search requests, so that they become very slow service and even server crashes [Data: Sullivan].

Nuowei Ge virus through e-mail and P2P networks to spread. According to Internet security firm MessageLabs information, then every 12 will have a message carrying the virus [data: BBC]. And cover letter similar to the virus, the virus will be carried out e-mail sender Nuowei Ge camouflage, which makes the virus through e-mail inquiries, the source extremely difficult.

Strange computer virus

Not all computer viruses are broken ring or network. Some viruses cause computers to a variety of strange changes occur. Early virus called table tennis table in the computer to generate a constant jump ball, but it will not harm the computer. Funny virus will give you a lot of that computer viruses, and it does not cause any harm, not self-replicate. If you do not trust it, you can use anti-virus software to remove them.