Chapter 4

"Beijing!" Yang Tian squints at the result report submitted by the scanner. Unexpectedly, the little lion is from Beijing. After thinking for a while, he secretly left a heart.

Beijing is the capital of the country and the seat of major government departments. If you want to know more about the other party's detailed address, you must invade the information bureau to check the route, but now there is not much time.

Yang Tian couldn't help being angry and scolded with a grin.

Then I analyzed the other party's IP again. This time, the declaration is more detailed and carefully analyzed each other's port.

"Actually opened DNS (domain name) service!" Finally, he found an available port on the newspaper. He thought to himself, whether you are an old bird or a national department, blow you first.

With that, open the shell overflow tool and enter instructions to overflow the DNS service in a disguised form.

Shellcode overflow attack in progress.

Taking advantage of his spare time, he hurriedly checked the progress of the other party. At this time, there are only four IPS on the connector, that is, there are only four auxiliary machines left.

I don't know whether it was discovered by the administrator or captured by him. Shit, it's so fast!

Open the command prompt to enter the connection interface, quickly take over the remaining four auxiliary machines and carefully check them. But I found a strange problem. The other party has stopped attacking.

Run away? While wondering, I suddenly see that the overflow attack has stopped and a command prompt window pops up.

Quickly enter two lines of instructions, and the DNS system permission of the other party will appear immediately.

Yang Tian was not happy. He was wondering how the other party would ignore this. Although this overflow vulnerability is not a low-level vulnerability, ordinary old birds will notice it.

The user name and password of the system administrator can be further obtained through the cmdshell of the system authority.

"Encryption, shit! What's the matter? This guy double encrypts the administrator ID and password!" After a pause, he said, "actually added a solidified shell." Yang tianlazy deciphered it and quit immediately.

As if he was still angry, he scolded casually: "you his mother!"

Deciphering an encryption program is not only a matter of time, but also luck. Moreover, the other party has a solidified shell. Yang Tian still knows that this kind of solidified shell is compiled by an old hacker in the United States. If you want to shell the file, your programming skills must be very strong. Ordinary shelling programs can't do anything about this kind of solidified shell at all.

Since the other party stopped attacking, Yang Tian didn't further decipher it. It was a fool for him to spend time deciphering the encryption program. First, the other party doesn't have what they want in the system. Second, they don't know what tricks the other party is playing.

After thinking clearly, he took a long breath and began to repair the auxiliary machine system. When he checked the back door of one of the auxiliary machines, he found a file with a red icon next to it.

File name: surrender! SMS! (English)

Yang Tian deleted this file, then hid the back door and logged in to the forum of HK alliance.

"Brother Weichao! Stop! I surrender!"

"Brother Weichao! I've stopped attacking! You're powerful, stop attacking me quickly!!"

"Ah! Are you overflowing my DNS buffer? Stop! It's a disguised overflow?"

"You finally stopped attacking!"

Yang Tian looked at the messages sent by lion one by one, hesitated for a moment, quickly typed a few words and sent them out.

"Self report your name! Otherwise, you'll be killed directly! Even if you double-layer encryption and solidified shell! It's no exception!" The word is still the word just now.

After a while, the other party replied: "I think brother Weichao already knows I'm from Beijing! I work in a company in Beijing and have been working in the underground black hat ring for a long time. I'm an old bird. The previous attack just wanted to make sure whether you really surround the nest. Now I've determined that brother Weichao is worthy of a mysterious existence of the black hat ring."

Yang Tian half believed his words. No matter what the other party says is true or false, I don't need to entangle too much with him. Suddenly thought of what this guy had said before, and immediately typed a few words and sent them.

"What are you doing after me!" He is still curious about this!

"Did you also participate in the Sino US hacker war two years ago? According to my information, there are 25 experts acting alone, and you are one of them! Tiger, the webmaster of HK alliance, is my good friend, so! Hey hey, find the word" Wai nest "in the database of the Forum. I bind your ID, and you will know as soon as you go online! You must have known this!"

In the hacker war two years ago, Yang Tiandao didn't pay attention to this. At that time, he guessed at least 10 by experience. Unexpectedly, there were as many as 25. Curious about who the other 24 people were, he quickly sent a message to ask.

The other party replied: "this is not allowed by my friend. You can't tell others casually! Hope to understand!"

Yang Tian sneered and looked at the clock. It was more than 3 a.m. and lit a cigarette. He stood up and twisted a few times.

"I especially want to know how brother Weichao spilled in disguise just now? Did you use this trick in the last China US hacker war? Tiger, the webmaster of HK alliance and I have studied this for a long time, but... By the way, can we talk for a while?"

"Gain an inch!" Yang Tianleng snorted and closed the browser.

Sitting on his back in the boss's chair, Yang Tian squinted at the tool. Suddenly, a faint smile crossed the corner of his mouth and said to himself: "shit, the little lion damaged my 10 auxiliary machines. Although I can find them back, I'm afraid it will take a lot of time not to crash your system. My heart is unwilling!"

With that, Yang Tian copied the 64 bit value encrypted by the other party and the file with solidified shell. Then he opened two tools from his own system, one is a high-speed decoding tool and the other is a parsing tool.

Enter the 64 bit value in the high-speed decoding tool, and drag the file with solidified shell into the parsing tool. The two tools run at the same time.

Yang Tian sighed in his heart that the success rate of 64 bit double-layer encryption numerical decoding should be very high. I scratched my head at the thought of the document with solidified shell. It can't be done in a short time.

If you want to shelling, you must prepare a corresponding shelling tool, and the preparation of the corresponding shelling tool also needs to know the operation principle and part of the core source code, and the analysis tool can only analyze part of the source code. As for the operation principle and core, you have to rely on your own research and exploration.

"Brain racking! Old hacker bastard! Nothing to do with such a abnormal solidified shell!" Yang Tian was upset at the thought of solidified shell.

The solidified shell has not been made public in China, and some senior old birds are reprinted from foreign servers. The price of this solidified shell abroad is very expensive, up to tens of thousands of dollars.

Well, it depends on the situation in a few days! Go to bed first! Shook a little dizzy head, turned over and lay in bed in a dream.

Yang Tian's house is a two bedroom and one living room type. One bedroom is reserved for himself and the other is his classmate and friend Zhang Yuan.

They were at the same table in senior three. Yang Tian was a transfer student and transferred to Zhang Yuan's class in the year of the college entrance examination. Zhang Yuan came from the countryside and studied well, but he was too honest. Yang Tian liked his simple character very much. Later, they were admitted to Shanghai FD University at the same time. Zhang Yuan's family is relatively poor and can't pay so much tuition at once. Although Yang Tian is not a kind person, he still takes care of Zhang Yuan. At present, he pays all the tuition for him, and then they apply for the computer department at the same time.

Yang Tian rented a house outside because of his "work" and finally pulled Zhang Yuan to live with him. The apparent reason is that one more bedroom is also empty. It's better to live together. Zhang Yuan was grateful to him, and he vowed to repay his benefactor Yang Tian in the future.

The reason why Yang Tian pulled him to live with him is only known to him. He is a lazy man, so he needs to be taken care of by himself!

It is autumn in early October. In the morning, the sun shines through the window in the living room.

"Dong! Dong! Dong!" Three knocks on the door, followed by a rather rough and honest voice: "brother Tian! Brother Tian! The meal has been cooked!"

A moment later, a lazy low muffled sound came from inside, "I see!"

"Pa!" The door was pushed open, and from the outside came a young man with inch short hair and brown earth face. The young man's face was covered with simplicity and simplicity, coupled with a pair of thick black eyebrows. At first glance, three words appeared in his mind, honest man.

Yang Tian heard the sound of the door, raised his eyelids a little, then closed it again, covered his head and said, "Xiaoyuan, go eat first! I'm sleeping! Don't worry about me!"

It was Zhang Yuan who came. His head tilted and he said in a simple voice, "brother Tian, the vice president asked you to lie down today. I came back yesterday to see that the door of your room was closed, so I didn't tell you."

vice-principal? What does the old man want from me. Yang Tian secretly said that life was helpless, revealing an arm from the quilt and touching it at the head of the bed.

"Brother Tian, what are you looking for?" Seeing his movements, Zhang Yuan hurriedly asked.

"Hey! Life! This is life!" One of Yang Tian's most disgusting things is lack of sleep. Rubbed his confused eyes, slowly sat up, turned his head and looked back and forth, and finally stared at the cigarette.

The first thing he did when he got up was not to eat, but to smoke. This has been a habit for many years. Perhaps it should be said that it is the fruit of a smoker's success.

Take a deep breath and spit it out slowly. Now, he was completely sleepless, his body was much more energetic, and his slightly fascinated eyes had returned to normal at this time. He said, "what does the old man want me to do?" Then he took out a cigarette and handed it to Zhang Yuan.

Honest people may not smoke. If they are addicted, it's not a matter of quitting for a while. Zhang Yuan is like this. Under the boast of Yang Tian, he finally learned to smoke. Although he doesn't smoke often, he occasionally comes to one or two at home.

"Hey, hey!" Yang Tian suddenly laughed. Every time he saw Zhang Yuan smoking, he wanted to laugh. It seems that Xiaoyuan is still not addicted. He completely ignores the existence of senior smokers like me. No! We have to make him a believer in cigarettes as soon as possible.

"What are you laughing at? Brother Tian!" Zhang Yuan was smoking without a mouthful. He took a mouthful and spit it out at any time. In that way, it was not like smoking, but blowing smoke.

"Nothing! Come to Xiaoyuan and sit down and chat!" Yang Tian waved and saw Zhang Yuan sitting by the bed. He handed him the pack of cigarettes in his hand. With a straight face, he said, "I'm bored studying in school. If I have nothing to do, I'll smoke two. I don't have to learn to be a fool."

"Attraction is harmful to your health. Brother Tian, you should smoke less! It's bad for your health." Zhang Yuan is honest and straightforward, but he is not stupid.

"You know what!" Yang Tian pretended to be calm, pointed to the cigarette box and said, "didn't you read it? Attraction is harmful, but healthy!"

Zhang Yuan grinned and didn't answer.

"Smoke is a good thing!" Yang Tian uttered a sigh, and then the conversation changed: "the old man didn't tell you what to do with me?"

Zhang Yuan hung his head for a moment, shook his head and said definitely, "no, the headmaster just said to let you go to his office this morning."

Yang Tian changed his clothes and combed it. He didn't have the habit of eating breakfast and dealt with it casually.

"Xiaoyuan, come with me to get some money!" Yang Tian looked in the mirror and said.

Zhang Yuan cleaned up the dishes and chopsticks on the table and asked suspiciously, "what do you do with money?"

"Come back and wash the dishes!" Yang Tian tidied up everything and said as he walked, "Hey, life is helpless!" After a pause, he said, "I don't go to school all year round. I only hang a name. You think the headmaster and teachers won't investigate! You have to pay tribute to him!" With that, they closed the door and went out.