how do worm replicate themselves? More importantly, how do they compile the code of their own in victim machin
86221
Worms do not compile code on the target machine.  The worm is already executable code.  When the worm executes, it creates a copy of itself, either as a new standalone executable or as a fragment copied into an existing program on the target machine.
1135009
Well, if you want to save yourself a lot of work, you can start by modifying one that already exists. Look, for instance, at Maxima (http://maxima.sourceforge.net/ ), and its integrate function. It's open-source, so you can look at the inside of the program to get an idea of how it works.
269590
Use a decompiler such as Reverse Engineering Compiler. \n\nhttp://www.backerstreet.com/rec/rec.htm
718203
We used to like to hack into the Nord 500 mainframe computer and do crazy s*it. It was mostly our intention to drive the Sys Admins crazy, or have them running around like wild geese. The funniest was the day the system crashed legitimately and they confiscated our code for over 24 hours!
171553
try to look for it on sourceforge.net.\nsome other useful resources can be codeguru and codeproject
1158336
Chathuringmes - it's another word for worms
280441
http://www.cs.ucdavis.edu/~haungs/paper/node11.html
90854
On the 3rd day of any month, approximately 30 minutes after an infected system is started, the worm overwrites files on local drives with the following extensions with the text "DATA Error [47 0F 94 93 F4 K5]":\n\nDOC \nXLS \nMDB \nMDE \nPPT \nPPS \nZIP \nRAR \nPDF \nPSD \nDMP \nTesting confirms that this payload does not affect mapped network drives.\n\nIt is programmed to attack every 3rd day on the month.\n- It is actually a WORM.\n- It is not as much effective as it expected.\n- Once a system infected by the worm all word, excel, powerpoint and Pdf file will be corrupted.\n- The mouse and keyboard will be locked and will force to restart the system.\n- Very little complaints made about the infections on this worm(about 3000 complaints)\n- In India and the state of Andhra Pradesh reported its database was locked. This explained becuase of the lack of prevention measurement taken by its engineers.\n- Did your system got affected by this virus?\n- Let me know if you receive any message on this.\n- wish you virus free computing..........!
674650
http://pearpc.sourceforge.net/doc.html
1160624
Every web page has 'source code'.  You can view it by hitting view and then source.  After that just copy and paste whatever code that u want
85424
If you can't do it, then how did they do it? \n\nCertainly you can! You basically need to hire a programmer to do all that for you.
390108
A compiler converts human-readable code into machine code, typically performing several optimizations in the process.\n\nAn interpreter reads the human code line-by-line, and executes each instruction as it finds it. Several modern interpreters also perform "just-in-time" (JIT) compilation as the script is executed by reading ahead in order to improve efficiency.
371708
Check out http://www.planet-source-code.com and do a search there.  Anything you find there would be in source code form, so you would have to compile it on your own machine.
111098
Some people know how to program and get a thrill thinking about all the havoc they can cause with a virus. Or they like the noterity it brings in the evil-hacker community.\n\nBasically, a more technical version of vandalizing stuff.
1152787
A very bad worm!\n\n" This worm will move itself into the Windows System32 folder under the filename WINMX32.EXE and may create the following registry entries so that it can " --by Sophos virus analysis\n\nFor more information and how to remove file, go to : http://www.sophos.com/security/analyses/w32agobotje.html
126567
In computer security technology, a virus is a self-replicating program that spreads by inserting copies of itself into other executable code or documents. A computer virus behaves in a way similar to a biological virus, which spreads by inserting itself into living cells. Extending the analogy, the insertion of a virus into the program is termed as an infection, and the infected file (or executable code that is not part of a file) is called a host. \n\nIn the context of computer software, a Trojan horse is a malicious program that is disguised as legitimate software. The term is derived from the classical myth of the Trojan horse. In the siege of Troy, the Greeks left a large wooden horse outside the city. The Trojans were convinced that it was a gift, and moved the horse to a place within the city walls. It turned out that the horse was hollow, containing Greek soldiers who opened the city gates of Troy at night, making it possible for the Greek army to pillage the city. Trojan horse programs work in a similar way: they may look useful or interesting (or at the very least harmless) to an unsuspecting user, but are actually harmful when executed.\n\nA computer worm is a self-replicating computer program, similar to a computer virus. A virus attaches itself to, and becomes part of, another executable program; however, a worm is self-contained and does not need to be part of another program to propagate itself. \n\nhttp://en.wikipedia.org/wiki/Computer_virus
427341
sorry to tell you this but it just dont work that way....\nmost of us know how to decompile code and extract or make the crack needed.\ncurrently I get paid to look over new SW and try to crack them. in other words I look for the holes and patch them up.\n\nif there was one SW to crack any program out there you bet we'd have that puppy blacklisted in a heartbeat.\n\nthis is a case of to learn how to crack you need enough coding experaince to make a program and if thats the case then you really dont need to crack\n\n\nPS google up the open source project.\nwhat ever SW your after you'll find there as a free open source and not worry about getting busted ;-)