Reborn Hacker

Small information:

buffer

This Chinese translation comes from when the high-speed parts of the computer communicate with the low-speed parts, the output of the high-speed parts must be temporarily stored somewhere to ensure that the high-speed parts match the low-speed parts. Later, this meaning was expanded and became "temporary storage" Storage area" means.

buffer overflow

It means that when the computer fills the buffer with data bits that exceed the capacity of the buffer itself, the overflowing data is overwritten on the legal data. The ideal situation is that the program checks the data length and does not allow the input of characters exceeding the buffer length, but absolutely Most programs assume that the data length always matches the allocated storage space, which creates hidden dangers for buffer overflow. The buffer used by the operating system is also called a "stack". Between various operating processes, Instructions will be temporarily stored in the "stack", and the "stack" will also have a buffer overflow.

Resident virus

The resident virus hides in the memory, and its behavior seems to be parasitic on various low-level functions (such as Interrupts). For this reason, the resident virus often causes more damage to the disk.Once the resident virus enters the memory, as long as the executable file is executed, it will infect it, and the effect is very significant.The only way to get it out of memory is to cold boot (turn off the power completely and then turn it back on).

Example:

Friday13th black (13th) Friday-"bright" reveals the details Onset date: every Friday the 13th

Date of Discovery: 1987

Origin: South Africa

Symptoms: NO.13 When Friday comes, the Black Friday virus will delete any poisoned file you want to execute.The virus infects very quickly, and the only sign of its onset is that the A: disk drive light will stay on. NO.13 Variants of Friday viruses registered on the record, such as: Edge, Friday13th-540C, Friday13th-978, Friday13th-B, Friday13th-C, Friday13th-D, Friday13th-NZ, QFresh, Virus-B, etc. The essence is almost the same, among which the Friday13th-C virus, when it infects files, a line of polite words will be displayed on the screen: "We hope wehaven'tinconveniencedyou"

Historic Significance: Adding More Darkness to the Friday the 13th Legend

"Shockwave" (2004)

Sasser, another worm that exploited a Windows flaw, caused computers to crash and reboot repeatedly.

Joe: [I met a hacker the day before yesterday. 】

Black: [Huh?What happened to the hacker? 】Since Xiao Yize is a hacker himself, he doesn't care too much about the information disclosed by Joe when he met a hacker.

Joe: [The computer I'm using now forgot to protect it at the beginning, and became someone's "broiler". 】

Black: [I didn't expect you to have such a time. 】

Joe: 【A horse stumbles, but a man stumbles.For this matter, I have been editing software for defense work for the past two days, and it was just completed yesterday. 】

Black: 【What software did you compile?Of course, if you don't want to say it, forget it. 】

Joe: [Actually, it’s nothing, have you heard of honeypots? 】

Xiao Yize, who was standing in front of the computer with a smile and openly doing private things during working hours, gave a meal, this action made Jerry, who was paying attention to him, feel a little heartbroken.

Xiao Yize didn't answer right away, and frowned slightly. If I remember correctly, Mentor Noah Howard once talked about this thing with himself, and it seems that this thing is doing some research under the hands of a friend of Mentor Noah Howard's.Since Xiao Yize is a hacker himself, he pays more attention to such things that are obviously not beneficial to hackers. What's more, his mentor is not too reassuring about him now, and will reveal any news to him.

Black: [Is it the thing that can check the attack methods in the background? ] He Ran saw that the other party hadn't answered for so long, and probably guessed that he was either recalling or checking some information, so he was not too surprised to hear his answer.

Joe: 【You know it too.This thing can continue to add additional functions. For example, I added a function that can automatically track the attacker's IP. 】 Xiao Yize raised his eyebrows in front of the computer, Joe's computer skills really shouldn't be underestimated.This smiling action successfully made Jerry fall into the guess that the Boss is going to punish him again.

Black: [The technology in this area is not yet mature in country M, I didn't expect you to already know it. 】

Joe: [It can be regarded as a special channel to get it.You don't have to promote it. 】Black: 【Then, because of this, you didn't show up for two days? 】

Joe: [Isn't it just this instant messaging software? I also spent a lot of effort. 】

Black: [Did you see my message? 】

Joe: 【What kind of shares and consultants are you talking about? 】

Black: [Yes. 】

Joe: 【This is also one of the topics I want to talk to you about today.I agreed, but it doesn't seem to work for me to agree now. ] Black: [I guess you still don't want to expose yourself. 】

Speaking of this, Xiao Yize couldn't help but smile.This smile made Developer A, who came to seek Jerry's new instructions, look out the window. The sun hasn't risen in the west, has it?It's a pity that it is cloudy now, so there is no way to verify it.

Joe: [There is still a distance between the Internet and real life.I agreed to your request only to make real life better, but my life is not bad now, so there is no need for the Internet to interfere with my reality. ] When Xiao Yize saw this, his expression was a bit uneasy. Did Joe mean that he never thought about letting people on the Internet go out of the Internet and contact him in reality?Although I know that Joe only regards him as a netizen on the Internet, I didn’t expect that in Joe’s thinking, there is a deep gap between the Internet and reality. According to this kind of thinking, the identity of Black is not even normal for Joe. Friends don't count.In any case, this was definitely a serious blow to Xiao Yize, who regarded Joe as a lover, and made him quite unhappy.

Developer A looked at the Boss' face, and suddenly felt that those people pushed him in because they were afraid of the Boss' anger from time to time.

Although Xiao Yize was angry, his reply was still polite.

Black: [If you believe me, I can open an account for you, deposit the money in, and then you can check it yourself.can it? 】

Joe: [OK.I still trust your character. 】

Seeing Joe's words made Xiao Yize feel a lot better. In Joe's eyes, his character is still good. This is good news. If he can meet Joe in reality, it will definitely be an advantage. Yes, if it is possible to...

Black: [Actually, I have already opened an account for you.Account number: 8726XXXXXXX43, password: 1234567, you can check it online. 】

Joe: [You already guessed that I would mention this? 】

Black: [No, this can only be regarded as second-hand preparation. 】

Joe: [Forget it, I won’t pursue that much anymore.Next, let’s talk about the antivirus software you mentioned earlier. ] When it came to business, Xiao Yize immediately put away all his emotions and returned to being such a cold president.

Black: [I want to know if our handling method before is okay? 】

Joe: [Honestly speaking, the way you deal with it is not impossible. At present, there is absolutely no problem.But if you continue to add virus databases to this antivirus software online, or add other functions, the program cannot perform effective detection on the received data, and the buffer will overflow when the computer fills the buffer with data bits. . 】

Black: [We only considered compatibility issues before, but ignored them. 】

Joe: [Actually, there is a simpler one... Wait a minute, I found that hacker.That's all for today, continue tomorrow. 】

Black: [Wait. 】

When Xiao Yize's news was sent out, Joe had already quit CHAT.

Xiao Yize stared at the computer speechlessly for nearly 10 minutes, and suddenly said to Jerry: "Last time, the anti-virus software dealt with it, rework it."

Jerry, who had been paying close attention to the Boss' expression, was silent in his heart: Is this a fire at the city gate, and will it affect the fish in the pond?

On the other side, He Ran hurried to the opposite side and pulled Qi Zhanhang past him.

"Huh? What's the matter?" Qi Zhanhang was checking a basic hacking tutorial on a certain foreign public website at this time, and he was dragged away by He Ran, and he still hasn't recovered.

He Ran naturally glanced at what he was watching, and replied: "Aren't you supposed to be watching something about programming? But now there is a real case of hacking, do you watch it?"

"Look." Qi Zhanhang immediately replied, "Looking at the basics of hacking is also for better programming. I don't think you can deny this."

"Forget it, let's not talk about this, you sit in front of my computer, and now a hacker is invading my computer." He Ran pushed Qi Zhanhang to his seat, and stood by himself.

The other party chose a completely different vulnerability from last time to invade. Of course, this vulnerability is now just a bait, a virtual vulnerability, and the real vulnerability has been fixed by Heran.However, the speed of the other party is not very fast. In order to make the other party experience a certain degree of difficulty, He Ran made a small modification to these virtual loopholes.

After the opponent chose this vulnerability, he was stumped by He Ran's small modification, and started a brute force attack. Half an hour later, he used the virtual vulnerability to enter He Ran's computer, and hid for 3 minutes until it was confirmed that the owner of the computer did not find his own. Action begins after action.Within 3 minutes of his initial action, He Ran's honeypot window had tracked out the right IP address.Moreover, before the real IP address of the other party, there is also a long list of IP addresses listed. These addresses are either the IP of the "broiler" or the IP of the agent. It can be seen that this hacker is not considered a mediocre hand.

Swagger thought he had encountered an opponent at first, but after confirming that the opponent had not discovered his invasion, he smiled contemptuously. Sure enough, this guy was not an opponent either.

Fingers are flying fast, swagger intends to do some small damage to He Ran's computer, which is regarded as punishment for the other party to make him mistakenly think that he has encountered an opponent.

Swagger intends to put a resident virus in He Ran's computer. This virus is adapted from Friday13th and changes the attack time to every Friday. It is named "FridayBinge (Friday Carnival)" by swagger. In addition to the original functions of Friday13th, the function of restarting the computer with a black screen has also been added.

"Aren't you going to stop it? That document doesn't seem to be a good thing, does it?" Qi Zhanhang clearly saw the other party's actions, so naturally he could see it too.

"You mean the virus? It looks like it was put in my computer, but it was actually put in the isolation box. Don't worry. I want to see what else he wants to do besides this." He Ran smiled.

Qi Zhanhang then continued to focus on the video display.

Swagger did not retreat directly after completing these operations. He opened a backdoor in He Ran's computer again, so that this computer will still be his broiler in the future.

"By the way, he really doesn't give up." He Ran said so, and finally started to do it.

Qi Zhanhang voluntarily gave way, and as soon as He Ran sat down, the invasion began.Like most hackers, He Ran prefers to intrude from system loopholes.Before FridayBinge, he and Swagger couldn’t have any big grudges. After the invasion, he didn’t directly destroy it. Instead, he opened a text document on the desktop and started typing. He didn’t quite understand. Last time, it was only used as a broiler. Why did he put it this time? Virus.

【Why did you put a virus in my computer? 】

Swagger had already realized the moment the mouse lost control, sure enough.

He replied: [I thought the guy who made me wait for a few days was a top-notch hacker, but he didn't respond to my intrusion just now, so he just waited for nothing to vent his anger.But unexpectedly, I finally guessed wrong. 】He Ran and Qi Zhanhang are speechless here.

[Small lesson. 】After He Ran finished typing this way, an adapted "Sasser" worm was written and stuffed into Swagger's computer on his own computer, and then quickly left the other party's computer.

The adapted version of Sasser would restart continuously for three hours, after which the virus self-destructed, leaving no trace at all, and the computer returned to normal.