Reborn Ace Hack

After Xiao Yuan left the manor, he walked on the mountain road outside for half an hour and finally stopped a pickup truck bound for San Francisco.

The pickup truck driver was a very talkative guy. After Xiao Yuan got in the car, this guy chattered like a talk show actor. Xiao Yuan's original plan to take a rest after getting in the car was completely frustrated. However, this guy was very eloquent.

, the words were also very humorous, which brought a lot of laughter to Xiao Yuan on his journey to San Francisco.

When they were about to arrive in San Francisco, this guy saw the laptop bag in Xiao Yuan's arms, so he turned the topic to computers. In order to deal with him, Xiao Yuan chatted with him casually, but this guy seemed to be very interested in computers.

Interested, listen to what Xiao Yuan talks about

He was clear-headed and mentioned that a computer at home had a problem recently. He wanted Xiao Yuan to go over and help him take a look at it. He also helped repair it. He also said that Xiao Yuan helped him repair the computer. When he went to Berkeley in the afternoon, he would

Let Xiao Yuan take a ride and so on.

Xiao Yuan asked a few more questions by the way, and initially judged that there should be no problem with this guy's computer hardware. The most likely problem was with the software. These problems should be easy to solve, so he agreed, which was a good reward for him to drive him to San Francisco.

Well, as for whether or not to take a ride back to Berkeley with him in the afternoon, we'll have to wait and see what happens.

Seeing that Xiao Yuan agreed, the black man seemed very happy. The car seemed to be driving a little faster. He arrived at the Golden Gate Bridge when the sun had just jumped out of the horizon. He was driving on this world-famous bridge. The sunrise in the east illuminated the road ahead.

The glittering golden light reflected on the road suddenly relaxed Xiao Yuan's somewhat depressed mood. At this time, the black man Martin became interested and sang an unknown song, causing Xiao Yuan to hum along.

Martin's home is located in a civilian community in San Francisco not far from Chinatown. When he pulled up to the door of his home, his wife Shani and six-year-old daughter Lucy were already standing at the door to greet him.

Xiao Yuan followed Martin out of the car. Martin picked up his daughter who was running toward him and introduced him to his wife. Martin's wife welcomed Xiao Yuan and then entered the house with them. She called Xia Jiuying first.

After calling to report that it was safe, Martin led him to a room and saw the computer he mentioned.

Xiao Yuan sat next to the computer and clicked on the switch on the computer case. The computer successfully passed the self-test and entered the operating system loading stage. However, the Windows 98 startup screen did not appear, but directly entered the DOS system. However,

According to Martin, his computer was pre-installed with Windows 98 system instead of DOS system, so the current situation is very abnormal.

There were some prompt messages on the computer screen at this time. Xiao Yuan took a look and found that the messages were very interesting: "Ah ha, do you still want to use the computer? Come play hide and seek with me. Find me and I will return the computer to you."

"I hired a lot of people, but they couldn't fix the computer." Martin pointed at the information and said with a wry smile.

"Didn't you find someone from the computer company to take a look?" Xiao Yuan asked.

"The computer is out of warranty. Let the computer company come to check it. It's better to just buy another computer. But I spent a lot of money to buy this computer. It would be a pity to throw it away like this. You know,

I'm not a rich man, I don't have much money," Martin explained.

Xiao Yuan nodded and did not ask these questions again, but said: "Martin, your computer is obviously infected, and it is possible that the virus has modified the system boot process so that every time it starts, it will enter DOS instead of Windows.

."

"Can you fix it for me?" Martin asked.

"I'll give it a try, but it will take a while, please wait." Xiao Yuan said.

"Great, I'll ask Shani to prepare breakfast for you, and I'll leave this place to you." Martin said very happily when he heard Xiao Yuan agreed, and then left the room and went out.

Xiao Yuan browsed the software on this computer and found that the only one that can be used currently is the most primitive and most powerful debug tool. After opening this tool, he looked at the flashing cursor on the black screen, a kind of

A familiar feeling came to my mind.

Using debug to read out the boot sector of the hard disk, after some analysis, Xiao Yuan found that the problem was consistent with what he had just estimated, and the boot sector of the hard disk had really been modified.

The normal system startup process of a computer is that when the motherboard is powered on, the basic input and output program (BIOS) on the motherboard performs a self-test on the computer hardware. After the self-test passes, the BIOS will read the boot program of the operating system in the boot sector of the hard disk.

memory, and then transfers control of the computer to the operating system for booting

Program, under normal circumstances, this boot program should find the Windows 98 kernel for loading, but the current situation is that this boot program has been modified and no longer points to Windows 98, but points to the DOS startup program in the hard disk.

the current results.

Knowing the reason, the next step was easy. Xiao Yuan wrote a program in assembly directly in debug. After executing this program, the pointer to the DOS program in the system's boot sector was corrected.

This operation did not take Xiao Yuan much time. He quickly modified the boot sector, then restarted and performed a system self-check. The familiar startup screen of Windows 98 appeared again, and the hard disk squeaked for a moment.

Entered the windows desktop smoothly.

After getting all this done, Xiao Yuan used the system's built-in anti-virus software to scan the system, and no viruses were found. To be on the safe side, he checked the system's processes and background services again, and no viruses were found either.

"It should be fine." So, Xiao Yuan said to Martin, who had just stood behind him and watched quietly.

"Thank you, that's great, Xiao, you are the best gift God gave me today." Martin said happily.

"You're welcome." Xiao Yuan said.

"I think you must be hungry. Shani has already prepared a delicious breakfast. Let's go eat." Martin added.

So Xiao Yuan turned off the computer and went out to eat with Martin. At this time, Martin's daughter Lucy had already had dinner in advance. When she heard that the computer had been repaired, she ran into the house to play.

Xiao Yuan sat at the dining table with Mr. and Mrs. Martin to eat breakfast, but after just a few bites, he heard Lucy yelling in the room, and Martin quickly dropped the cheese in his hand and ran into the room.

"Xiao, come here quickly and see what's going on?" Xiao Yuan heard Martin shouting, so he also put down the food in his hand and ran into the room, only to find a chubby little green man appearing on the computer screen.

He held a broom in his hand and worked hard on the screen. The areas he swept turned black, and some writing leaked out of the black areas.

"It should still be that virus. It was not cleaned up just now. Martin, please take Lucy out and I will help you take a look." Xiao Yuan said.

"Okay, please." Martin picked up Lucy and walked out of the room.

Xiao Yuan sat next to the computer and watched the little green man sweep the computer screen to black, and a line of writing leaked out.

"Haha, you haven't found me yet, come find me again."

Xiao Yuan looked at this line of information with a look of surprise on his face. On the one hand, this virus made him feel like a naughty child playing a prank. More importantly, this line of information was actually written in Chinese.

"Could this be a virus written by a Chinese? What on earth did he want to do by writing this thing? Is it just a prank? No matter what, let's find the original virus first."

Xiao Yuan made a decision quickly, and at this moment, the computer automatically restarted and entered the DOS interface again. The original line of English information also changed.

"Aha, I'm here again. Let me tell you, I'm hidden very deep. It's not easy to find me."

Xiao Yuan opened debug again, looked at the hard disk boot sector again, and found that the boot sector had been modified again. After exiting debug, he ran the repair program he had written previously, entered debug again, and checked the boot sector again.

sector, and after confirming that the boot sector had been repaired, he used debug to rewrite a program and implanted it into the hard disk boot sector. This program just used

A period of free space in the boot sector of the hard disk is used to set up a trigger. This trigger will detect whether the boot sector of the hard disk will be modified. Once it is found that the boot sector will be modified, the trigger will run and the stored

A program in another part of the disk is loaded into the memory to repair the disk sectors. During the repair, in order to prevent the trigger from being erased by the virus program, a new trigger will be regenerated in the boot sector.

After doing this work, Xiao Yuan wrote another assembly program in debug, but did not assemble it into a binary file. Instead, he restarted the computer. After the computer entered Windows 98, he used the debug of Windows 98 to compile the program just now.

Assemble, generate a small executable file, and execute it.

Just after Xiao Yuan executed the file, the small green skull on the screen appeared again, but the small skull flashed on the screen and then disappeared.

Xiao Yuan looked like this and quickly operated on the keyboard with his hands. Using debug and with the help of the small tool he wrote, he quickly located an area in the memory. The binary code in this area had been locked.

"Let me see where you are running." Xiao Yuan muttered something, and at the same time, without stopping, he wrote several assembly commands in the debug file. The code in the memory area was copied and saved into a text file.

Then the code in the memory is cleared.

After clearing the code in the memory, Xiao Yuan once again used the small tool just now to perform some positioning, and successfully found a block on the hard disk, and saved the content of this block into a text file, and then

This block has been deleted.

After getting this done, Xiao Yuan restarted the computer. This time he took the initiative to enter DOS and rewrote a program. He used this program to conduct a full search of the disk based on the characteristics of the virus he had just intercepted. The search results were again

Several virus-infected areas with the same characteristics were found and deleted.

"There should be no more advanced virions this time. I hope there won't be more advanced virions, otherwise we will be in trouble." Xiao Yuan thought to himself that the so-called advanced virions are a term he coined, and high-level virions generate low-level viruses.

The original body, such as the little green man program, generates boot sector viruses, so the little green man program is more advanced than the boot sector virus.

After restarting the system again, the computer successfully entered the Windows 98 desktop, and a dialog box popped up.

"Wow, you are so awesome. I won't play with you anymore. Goodbye!"

Xiao Yuan did not dare to close the dialog box directly. Instead, he ran the gadget again, then closed the dialog box and let the computer run for a while, and no more abnormalities occurred.

In order to confirm that there was really no problem with the computer, Xiao Yuan opened many programs one after another, but found no problems. He finally opened the browser and decided to take this opportunity to go to the Xuannie community to see where things were now.

After entering the Xuannie community, Xiao Yuan browsed some posts and his expression became a little gloomy.

"Too much!"