Viruses that remove itself at the end of theri missions
by Cold_AXE - 3/19/12 8:45 AM
In Reply to: Rootkit by MarkFlax
It reminded me our informatics course down at the past, and yea it might happen to be programmed like that, so at the end it destroy itself... but it isn't an really virus but an malware. Anyway, you can test by your self and all you need is just "Notepad.exe" and just some information.
Type on page of Notepad:
echo this is a virus /* or whatever you like */
del filename.txt /* a file name that you know that is there down on the location for delete */
del virus.bat /* at this moment the batch file virus destroy itself without let you out understand what happened */
Now on menu File > SaveAs name the file as virus.bat and put on same folder of the file for delete and click.
This way we used to destroy systems, but now it works the same for USB Drive - but it is sometime called autorun.inf or modified the file that some usb have for some reasons (let say for logo on load) have, but that is just the load and not the virus. Because 16bit applications mostly don't work normally on newer OS, the same idea is worked but with other applications rather than Notepad.exe and the "autorun.inf" just call the real virus.
If you create this batch file just for learning and scan with antivirus it seams to be ok and just a few Antivirus check the code inside. but if you change the period from .but to .exe or .com then the virus will work and the Antivirus is not going to check the code anymore because for it, this is a binary file and even for your OS.
Lastly, a virus can not inject itself and destroy itself, because the memory it would be full because of infinite process of self inject and self destroy. these are named and classified as malware and backdoor trojans are just a bridge to let you after inject your virus, file or whatever you want to pass to your enemy.
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