Twelve Tricks Trojan Virus

Wednesday, December 7, 2011

What is Twelve Tricks??

Twelve Tricks is a trojan horse that first appeared around 1990. Purdue University issued a bulletin about the Trojan on March 8, 1990. The Trojan came in an altered utility file called CORETEST.COM, which was intended to test performance of hard drives. The trojan affected IBM platform computers running MS-DOS or PC-DOS. The trojan alters the master boot record (partition sector) and, at every reboot, it installs one of twelve "tricks" that causes issues with hardware or operation of the computer. The trick vanishes when the power is cut off, and any of the twelve tricks may appear or reappear on the next reboot. In addition, on each boot the trojan uses a random number generator to determine whether to do a low-level format of the active copy of the boot sector and the first copy of the FAT; there is a 1/4096th chance of this happening. If the format does not happen, the trojan randomly changes one random word in any of the first sixteen sectors of the FAT, leading to a gradual corruption of the file system.

Facts about Twelve Tricks Trojan Horse

Name: Twelve Tricks Trojan
Types: Only one known variant: CORETEST.COM VERSION 2.6, 32469 bytes, timestamp
6-6-86 9:44
Platform: IBM PC and PC clones running MS DOS or IBM-PC DOS
Damage: Varies from slow program execution to low level formatting of disk
Symptoms: A variety of disruptions and/or damage, based on a random number
between one and twelve. Affects system performance, writing to screen, clock,
printer and/or keyboard malfunctions, random disk writes, garbled printer
output, boot sector, File Allocation Table (FAT) or directory overwrites, and a
low level format of select tracks on the hard disk. Other symptoms include the
floppy disk motor continuously running, FAT, directory and/or boot sector
damaged diskettes.
Detection: Examine the Master Boot Record (MBR) for the message:

SOFTLOK+ V3.0 SOFTGUARD SYSTEMS INC
2840 St. Thomas Expwy, Suite 201
Santa Clara, CA 95051
(see important note below)

or search the MBR and memory for the following hex string:

e4 61 8a e0 0c 80 e6 61.

If you suspect a program, you can use the search string:

64 02 31 94 42 01 d1 c2 4e 79 f7

Caution: These search strings are based on the Trojan program examined by the
discoverer. If there are modifications to this program, the above search
strings may not work.

Eradication: Remove Trojan program by deleting. To recover from a corrupt MBR,
back-up current data files and programs, perform a low level format and restore
data files and programs from a recent backup.

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How To Block A Website Without Any Software

Friday, November 4, 2011

Today i am sharing way to block a website. It is very easy way to block a website without using any software. This way block any website in all browsers. You don't need to block website in all browsers one by one. Follow below steps carefully -

1) Go To - C:\ > Windows > System32 > Drivers > Etc
in your computer or directly go to this url in your computer - C:\Windows\System32\Drivers\Etc

2) Now In Etc folder you can see 5-6 files. In these file select "hosts" file and open it in notpad.

3) In notpad you can see like this -

At the bottom you can see - 127.0.0.1 localhost

Type the same below it and change localhost with you domain name like this -

4) After adding domain in notpad save that file with save name.

Now open your browser and type that domain which is block by you and see it really works. You can also do this for preventing ads and spyware. This is specially for parents =)) who want to protect their children from accessing unwanted websites. If you want to access that site which was blocked by you then open "hosts" file in notpad and remove that line which is previously added by you and see its again opening.


Related Post : Different Ways To Access Blocked Sites

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How To Make Your Computer Speak With Whatever You Type

Wednesday, October 19, 2011

This Is Very Cool! Trick To Make Your Compurter Speak With Whatever You Type. It Is Very Easy Trick. For This You Don't Need Require Any Programming Language. To Make Your Compurte Speak Or From Text to Voice Follow The Steps -

- Open New Notpad In Desktop And Paste Following Code in It -

Dim message, sapi
message=InputBox("What do you want me to say?","Speak to Me")
Set sapi=CreateObject("sapi.spvoice")
sapi.Speak message

- Now Save Your Notpad With Any Name With .vbs extenion. Example - Speak.vbs

- Now Double Click On Your Saved File. New Box Is Opened Type Whatever You Want Your Computer To Speak And Click Ok.

It Is Very Impressive And Funny Trick. Enjoy !!

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