Tag: all

• Posted by melchionda at 2020-04-16

  how does the abs work?

  How does the ABS work?

  Most people are familiar with the term Anti lock braking system (ABS), but many people know little about the anti lock braking, working principle, special maintenance or replaceable components in the anti lock braking system.

  Automobile rubber parts tell you that anti lock brake is essentially an enhanced or improved type of common brake. In short, the ABS is designed to prevent the brakes from locking and slipping when braking on difficult or wet or smooth surfaces. By preventing dangerous taxiing and allowing the driver to maintain steering control when attempting to stop, this adds significant safety to everyday driving. So how do we use it? Let's learn about it with Xiaobian.

  Let's see how ABS works first

  All ABS systems control tire slip by monitoring the relative deceleration rate of the wheels during braking. If a wheel begins to decelerate faster than the other wheels, or at a faster speed than programmed into the anti lock control module, then the wheel begins to slide and there is a risk of disconnection of traction and locking. The ABS system responds by momentarily reducing the hydraulic braking of one or more affected wheels.

  The electric solenoid is used to hold, release, and reapply hydraulic pressure to the brakes. This produces a pulsating effect, which is usually felt in the brake pedal during braking. The driver may also hear a hum or chatter from the ABS hydraulic unit.

  The rapid adjustment of the brake pressure in the brake circuit reduces the brake load on the sliding wheel and allows it to regain traction, thus preventing locking. It is the same as the brake, except that the ABS system is automatically completed for each brake circuit, and the speed is impossible for human beings. According to different systems, it can reach dozens of times per second (some faster than other brakes).

  Once the deceleration rate of the affected wheel is restored to the same as that of the other wheels, normal braking function and pressure are restored, and the anti lock device is restored to passive mode.

  Anti lock brake control module

  The ABS electronic control module (which can be called EBCM "electronic brake control module" or EBM "electronic brake module") is a microprocessor whose function is similar to engine control computer. It uses inputs from sensors to adjust the hydraulic pressure during braking to prevent the wheels from locking. The ABS module can be located in the luggage compartment, passenger compartment or under the hood. It can be a separate module or integrated with other electronic devices, such as body control or suspension computers. In the newer ABS system, it is installed on the hydraulic modulator.

  The key inputs of the ABS control module are from the wheel speed sensor and the brake pedal switch. When the brake is applied, the switch signals the control module, which changes it from "standby" mode to active mode.

  When ABS braking is required, the control module starts to act and commands the hydraulic unit to adjust the braking pressure as required. On systems with pumps, it also supplies power to pumps and relays.

  Like any other electronic control module, ABS module is easily damaged by electrical overload, impact and extreme temperature. If there is a defect, the module can usually be replaced, except on some of the latest systems where the module is part of the hydraulic modulator assembly.

  Antilock brake pump and accumulator

  In some ABS systems, high-pressure electric pump is used to generate power assist for normal braking and reapply braking pressure during ABS braking. In some systems, it is only used to reapply pressure during ABS braking.

  The pump motor is powered by a relay that is turned on and off by the ABS control module. The fluid pressure generated by the pump is stored in the accumulator. The accumulator on the ABS system, in which the hydraulic regulator is a part of the master cylinder assembly, which is composed of a pressure storage chamber filled with nitrogen.

  If the pump fails (the warning light comes on when the standby pressure drops too low), there is usually enough standby pressure in the accumulator to perform 10 to 20 power assisted stops. After that, there was no power assist. The brakes are still working, but more needs to be done.

  On ABS systems with conventional master cylinders and vacuum boosters for power assist, small accumulators or a pair of accumulators can be used as temporary holding containers for brake fluid during the hold release reapply cycle. This type of accumulator usually uses a spring-loaded diaphragm instead of a nitrogen chamber to store pressure.

  So what should we do? Here's what to do and what not to do

  Millions of cars use anti lock braking systems (ABS), but many drivers still don't know the "right way" to use ABS in an emergency. So here is the "do or not do" of anti lock braking:

  What to do: please put your foot on the brake pedal. Keep the brake pedal stable and constant pressure, and make the four-wheel ABS work normally. Even if the brake pedal is pulsating, avoid applying the brake. If you have a light truck with rear anti lock (rwal) brakes, brake the pedal with sufficient force to stop your truck without locking the front wheels. This allows you to maintain steering control and the rear anti lock system prevents the vehicle from skidding.

  Please leave enough distance: when driving under good conditions, stay behind the vehicle for three seconds or more. If conditions are dangerous, please allow more time.

  Practice driving with ABS: get used to the pulsation in the brake pedal when the anti lock brake is activated. Open parking or other open areas are great places to practice emergency parking.

  Don't do it:

  Do not drive vehicles with ABS more actively than vehicles without ABS. In any vehicle, it is risky to drive a curve faster, suddenly change lanes or perform other aggressive steering maneuvers.

  With the four-wheel ABS system, the pumping brake turns the ABS on and off, reducing braking efficiency and increasing braking distance. ABS automatically provides you with brakes at a faster speed than your manual operation, and enables better steering control. More importantly, it can also brake on individual wheels as needed - something you can't do.

  Car rubber parts remind you not to forget to turn. Four wheel ABS can help you avoid dangerous situations. When ABS is active, these conditions are normal and let you know whether the anti lock brake system is working normally. However, when braking normally on dry roads, there should be no ABS feedback. ABS should only function when panic stops or when the road is wet, cold, smooth or covered with loose gravel.

  Related labels: automobile rubber parts, automobile rubber sleeve, automobile rubber pad

• Posted by zura at 2020-04-16

  zabbix server: utilization of unreachable poller data collector processes, in %

  I don't want to say no against this French video! 3535 \ 3535 \ \ \ 3535 \ \ \ \ \ \ \ \ \ 3535353535353535353535 \ \ \ \ \ 353535353535353535353535353535353535353535353535353535353535from the zabix & u server.conf file, we can see that Steve is a very good person and very popular.

  A little less obvious research I want to study here

• Posted by fleschner at 2020-04-16

  rootkit: linux rootkit

  Yet another LKM rootkit for Linux. It hooks syscall table. Features: Hide files that ends on configured suffix (FILE_SUFFIX - ".rootkit" by default).

  FILE_SUFFIX COMMAND_CONTAINS

  Examples:

  .//./malicious_process wget http://old-releases.ubuntu.com/releases/zesty/ubuntu-17.04-desktop-amd64.iso .//./ /etc/http_requests[FILE_SUFFIX] /etc/passwords[FILE_SUFFIX]

  • Rootkit module is invisible in lsmod output, file /proc/modules, and directory /sys/module/.

  lsmod /proc/modules /sys/module/

  • It isn't possible to unload rootkit by rmmod command (if option UNABLE_TO_UNLOAD is set).

  rmmod UNABLE_TO_UNLOAD

  • Netstat and similar tools won't see TCP connections of hidden processes. Configuration: The configuration is placed at the beginning of file rootkit.c.Below is a default configuration:

  rootkit.c Linux x 4.13.0-kali1-amd64 #1 SMP Debian 4.13.10-1kali2 (2017-11-08) x86_64 GNU/Linux

• Posted by bax at 2020-04-16

  what position management and stop point experience do you have?

  Position management has a thorough understanding. You are not far from stable profits. In the last two weeks, I have been brewing a long article about high-quality dry goods that I want to write to you. I have made an in-depth analysis of a series of factors affecting the stock market, such as economy, politics, time cycle, position management, main game, fundamental research, technical analysis, etc.

  The result is that the more we are brewing, the more we can not write. Because the influence of these factors on the stock market is thoroughly analyzed. It is estimated that at least one book with tens of thousands of characters should be written. I can not express myself clearly in writing hundreds of thousands of words in the official account. In fact, everyone in the stock market knows something, but most people only know this knowledge, but they can't do it. There is a little variable factor changed, and they are at a loss immediately. The difference between a master and an ordinary person is that a master thinks through the internal logic and connection of all the influencing factors, and knows which are the main influencing factors and which are the secondary ones at each stage. Thought is a process of gradual formation. To make others truly understand and have meaning, it must be logical and withstand scrutiny. It must take a lot of effort to elaborate every detail, and finally it can be understood and achieved. So if I only write a few hundred thousand words, I can't express the analysis of all these influencing factors effectively. Even if I express them, they are still wet. Just yesterday, after sending out the daily analysis, a follower said in the comment that he wanted to see my understanding of position management. Suddenly I came up with a word called serial. Since I can't write all the above analysis of the factors that affect the stock at one time, I'd better write an article separately for each of these factors. After I've written each item, I'll summarize it in a comprehensive way at last. Today, I'd like to write about my understanding of position management, which is the first draft of this big article about position management in the future. text

  As for instinct, the position management of most retail investors is just because instinct is completely reversed. You can take a look at the diagram above. This is the state of most retail investors in the top area. In the bottom area, retail investors are afraid to cut their meat and empty their positions. Here's a line on the Internet to let you know what retail investors are most willing to believe among the big bull bears from 2005 to 2008: from June 2005, they began to rise

  1000: China's stock market must be overturned! 1300 points: overshoot rebound, short line top 1500 points: phased top 1800 points: limit high 2200 points: the market is at high-risk point 2500 points: bubble 3000 points: 90% institutions think that breaking through 3000 points is very difficult 3500 points: the overall bubble appears 4000 points: bubble can break up 4300 points: the stock market is extremely crazy, the introduction of tax increase policy. 4500 points: the bull market just started 5000 points: the first year of the ten-year gold market 5500 points: the new starting point of the stock market 6124 points: China's stock market embarks on a new journey, On the way down (from October 2007): 6124 points: it's hard to buy cattle; 5500 points: the short-term callback is to better rise 5000 points: the long-term iron bottom, the bold purchase 4500 points: the market has fallen 4300 points: it's quite dangerous to short 4000 points: the opportunity to build a position in the middle line comes 3500 points: at present, it's not suitable to kill blindly 3000 points down: stamp duty market, 2500 points below policy iron bottom: 80% of institutions think the market has bottomed out 2000 points: it can never fall below 1800 points: China's stock market has no hope 1664 points: China's stock market must be overturned again! Most people will laugh when they see this story, because from the perspective of God, they really put you back between 2005 and 2008, and most of you will believe it. Some people say that it's very simple to speculate on stocks. It only depends on the status of most retail investors. When the big lady who sells vegetables rushes to borrow money into the stock market, she leaves the market quickly. When the God of stocks next door, Lao Wang, has lost his doubt about life and vowed to cut his flesh and never enter the stock market again, that's the bottom of history. It makes sense. Seeing this, you may think that I take the starting point and the ending point of bull market as an example of taijiduan. Next, I'll talk about the most common daily example of the instinctive position management of retail investors. China's stock market is short and long, but even if it is a long bear market, there is no trend of unilateral decline and no rebound. Once there is a rebound, retail investors are sure to grab it. Let's see the psychological process of retail investors in the rebound. Retail investors generally know a concept, and bear market is not the bottom. So in the process of short-term decline, generally no one dares to rebound. One day, suddenly a male line appears. Retail investors often wonder if the main force is attracting more, but they are afraid to miss the rebound, so they don't want to be completely short. So they start to tentatively build positions such as one-third of the positions. As a result, the next day there is another male line, which makes retail investors happy. It seems that it is indeed true Rebound, my judgment is right! At this time, analysts of stock evaluation began to vigorously publicize that the stock market rebounded. After analysis, the rebound must return to at least two-thirds of the starting point. Retail investors heard that, alas, this analyst has the same level as I thought, but he can also give the specific position of the rebound. In one stroke, he bought the remaining two-thirds positions decisively, thinking that I am now full and so on Less than half of the starting point will go out, certainly can go out, even if the quilt cover is the group of real trust that analysts think can rebound to two-thirds of the starting point of retail investors. Later, I don't say you can imagine that the moment of full warehouse is the beginning of a new round of decline. In this case, the instinctive position management of retail investors is that the rebound starts to light the position, rebounds two positive lines, remembers the heavy position, and completely reverses it. This is because retail investors naturally like to take advantage of the small advantages that they are very smart. The correct way to fight for rebound is to take out no more than half of the positions to fight for rebound on the way down, and it's the most frightening short-term sharp drop. After that, immediately make a big effort to draw back and then fall back again. When it didn't fall below the price that just fell sharply, it began to buy half of the positions at one time, and gradually reduce the positions to short positions with the rebound. Note that I said no more than half of the positions are for people with very high short-term technology, and people with average level should not rush to rebound at all. 2. There are many bestsellers about position management in the bestsellers, and I have read many of them, but few of them are of high level. Most of them can help retail investors and make them lose money faster.

  Let me list some of the best sellers in the mainstream of bin management. (1) After going out of the rising trend, more and more positions will be added. In the falling trend, short positions will wait or light positions will participate in the rebound. (2) If the stock price falls by 10% and the position increases by 10%, we don't believe that the stock price can fall to one tenth of the current price. If it does fall to one tenth, it will be full, time for space, and it will always rise back. (3) Don't put eggs in one basket. Only by dispersing investment can you be safe and avoid meeting Black Swan effectively. (4) Small amount of retail funds, we must re position a share, so that we can have a chance to turn over. The above four positions management views are the most common ones in the book. I want to express that these views have some logic compared with the positions management of most retail investors who rely on instinct greedy, small and cheap psychology. But just talking about these without considering other factors, retail investors operating according to these four views tend to accelerate losses. There are specific conditions for these positions management views, not that retail investors can apply them at any time. Here is my opinion:

  (1) If the stock market has been falling for several years, and then it has been trading sideways for another year or two, once it goes up and out of the trend, it can buy without thinking in the medium and long term, and at least 70% of the positions are not full, and then it can be held patiently for a long time. For retail investors, it's not necessary to buy more and more in different positions, but you have to make sure that this is the beginning of the trend, that is, the fish head has gone out The situation that comes, decisive heavy position, have callback also won't be too deep. (2) Generally, it is not recommended to buy more and fall more, which is only suitable for the short-term operation on the way down. If there are many left side trades that have fallen short-term to fight for the rebound, then if the first buying position is not the lowest point of the short-term, you can appropriately add the position after having a lower point. Note that this is about the short term. On the way down, we should never hold the idea that the long term will come back one day. Retail investors tend to change the short term into the middle term, the middle line into the long term, and the long term into contribution. On the way down, it is only suitable for short-term trading of light positions. (3) Whether to put eggs in a basket or not, I find that generally speaking, the more novice, the more likely they are to buy more stocks. I think if retail investors don't have 500W, they can't buy more than three shares at most. If there are more shares, they can't operate. China's stock market rises in a round and falls together. Therefore, in the case of small capital scale, it is more scientific to focus on two stocks, with a maximum of three stocks. The above three are mainly about the relationship between positions and the position, time and capital volume of the market. Next, I will talk about the relationship between positions and stock selection ideas. I think for a retail investor who wants to learn and grow by trial and error and want to make profits, no matter what stage or position, it's generally better to take out one or two stocks with 70% of your current position, and another 30% of your position as short-term risk preference position. It's better to specifically trade stocks you don't hold, which is helpful for learning and growth. 70% of the current positions are responsible for making profits and 30% are responsible for learning and experiencing new trading methods. Finally, I'll talk about the concept of short position. Many times, retail investors want to make money mentality can not stop, do not trade hard is a common problem for novices. In my opinion, if the market is in a downward trend, it should be short, and the short time must not be short, and it must be able to bear loneliness when it is short. I don't think that people who can't learn to short positions can make long-term stable profits in our large a shares. Even if you make more money, you will return it one day. Think about the three share disasters last year? Conclusion: position management is a systematic problem, which includes both control level factors (to solve the problem of not doing) and operation level factors (to solve the problem of how to do). Position management must be considered with other factors to be a perfect trading system. Because of the limited time and space, I've only talked about a few of my own understandings here, which will certainly not be comprehensive. But I think for novice retail investors, first of all, I've done what I said, and you should not withdraw substantially as before. In addition, I think today's article, should not be a novice read it all the time can really experience. If you can really think through every detail logic of position management, it is not far from stable profitability. I will slowly write the big article on analyzing the comprehensive factors of the stock market mentioned before, and then serialize it. Today, I just wrote a part of one of the factors. Don't worry. Writing such an article is much more tired and slow than daily analysis. A little slower will guarantee the quality. This series of articles I wrote should be integrated into a book at last, and it is more suitable for retail investors to talk about investment logic. I am confident to surpass most of the stock market investment books on the market.

  Finally, if you find the article useful, you should pay attention to the WeChat official account: Panda potential fusion, a WeChat official account that you invest in research and analysis and dare to display your own firm operation.

• Posted by bax at 2020-04-15

  sample technology analysis and protection scheme of dridex online banking trojan

  Reading: 2035

  IBM X-Force security team recently found an upgraded version of the dridex bank Trojan horse, known as the dridex v4. Dridex is one of the most popular bank Trojans, which was first discovered in 2014. It was considered as the successor of Goz because it used the technology related to gameover Zeus (Goz) malware at that time. An important improvement of the new version of dridex V4 is that it uses atom binding technology to inject malicious code to avoid the killing of anti-virus software.

  Atom binding technology is proposed by ensilo company. It takes advantage of the design defect of atom table in Windows operating system, and can write malicious code into it, retrieve and execute it later.

  Sample overview

  The sample is a 64 bit DLL file, which uses atom binding technology to inject code into explorer.exe to complete traffic hijacking. Set the registry key value to complete self startup, and create the scheduled task to execute every 1 hour.

  Sample analysis

  Analysis environment

  TAC test results

  file structure

  Version information

  major function

  • Modify the local key set file to generate a new key pair for hijacking HTTPS communication.
  • The sample will create a scheduled task to run the application, hijack it with DLL to run itself, run the normal application by setting the startup key in the registry HKCU \ software \ Microsoft \ windows \ CurrentVersion \ run, and hijack it with DLL to realize startup and self start.

  3. Add firewall rules by creating and running CMD file to allow explorer.exe to listen on port, and then listen on local port 443.

  4. Hijack the data flow of port 443 and send it to the remote server.

  The execution flow is as follows:

  Each function of the sample is briefly introduced as follows (including code snippet and explanation):

  1、 Get target thread

  Decrypt itself to construct a new DLL file:

  Read the process snapshot and find the Explorer process:

  Get the import table data to be injected:

  The functions in the import table include:

  In order to find a warning thread, the sample opens all threads of explorer.exe (the current process thread is 0x26) for testing:

  Create an event:

  Request to execute zwsetevent through ntqueueapcthread API in other threads:

  Then call WaitForMultipleObjects to select the first thread to set the signal:

  2、 Write the import table of injection code to the target

  Add a string to the global atomic table and verify that it was added successfully:

  Through the ntqueueapcthread API, the target thread calls globalgetatomw, which retrieves data and places it in the RW memory space of the target thread ntdll module (write one, delete one):

  Determine whether the data is written successfully by reading the data written to the target thread and comparing it with the local original data:

  Set a block of memory in the target thread as RWE attribute, and write the decrypted assembly code in the same way as writing the import table multiple times:

  When finished, change the memory property to re:

  In the same way, change the first 7 bytes of globalgetatomnamea in the target thread to skip to the shellcode instruction:

  Modified globalgetatomnamea function:

  Through ntqueueapcthread API, the target thread calls globalgetatom. Since the first 7 bytes of the function are changed, shellcode will be executed:

  Shellcode section:

  Restore changes at globalgetatom:

  Map the data from the original sample into memory and copy it to the newly applied local memory space:

  Modify the memory area properties of the copied data to read and execute:

  Create a thread to execute the copied code, set the event after completion, and then return to execute the original thread.

  This thread will get IAT:

  After the sample memory is mapped and copied to its own memory, it is transferred to execution (with parameters, which are the address of the previously copied data):

  Check whether the parameters are valid:

  Create a thread if the parameter is valid:

  Modified the keyset file and created a new key pair. This part of the operation is to hijack HTTPS communication later:

  New generation key pair:

  Read the EXE file in the C: \ windows \ system32 Directory:

  Select the target file to forge from its import table, read it into memory and view the import table and other contents:

  A new PE file is created (the file is forged by the sample according to the export table of the normal DLL file, which is used to realize DLL hijacking). It is saved in the temporary folder:

  Some *. CMD files are created to add rules to the firewall, allowing explorer.exe to listen to the local port:

  Put the newly created temporary file into the new folder and name it appwiz.cpl (appwiz.cpl selects the forged target file for the sample, which is related to the application calling it, pretends to be a malicious sample of the appwiz.cpl file, and executes the same content after obtaining the execution right as the decrypted sample file), and optionalfeatures.exe (calls the normal application of appwiz.cpl) Put it in the folder (optionalfeatures.exe is the target application program, the appwiz.cpl file will be called at runtime, and the malicious sample will hijack it), and set the normal application file as the startup key through the registry.

  C: There are two similar folders in the \ windows \ system32 directory. Only one of the applications is set to start when the machine is started, and the other is executed by creating a scheduled task, which is executed every other hour to realize memory persistence:

  Set the *. CMD file path created to the registry key HKCU \ software \ classes \ mscfile \ shell \ open \ command (default):

  Create the process eventvwr.exe to execute each CMD file. Due to the previous modification of the registry related key, the process will run the program under HKCU \ software \ classes \ mscfile \ shell \ open \ command, and then recover the registry key related to this, and execute a clear one:

  After the above operations, the sample begins to perform the functions of the network part.

  Network behavior

  The network function of this sample is to hijack 443 port traffic.

  Listen to the local port 443, and select infinite loops. If it succeeds, accept and then create a thread:

  After simulating the connection, the sample creates a new thread:

  Try to receive data:

  After receiving the data, call the connect function: (the IP address of the connection is invalid 0.0.0.0):

  After simulating the connection, the discovery program sends the data received by port 443 to the newly connected server, and then starts to repeat the receiving and sending actions:

  Starting mode

  Create a boot entry similar to this: the application is a normal program, and there will be a DLL file required by the application when it is running in the same directory. Hijack it when the application is running to complete the self boot:

  Killing soft confrontation

  The samples are executed by dynamic link library hijacking, and shellcode is injected by atom binding technology. After injection, the original program environment is restored to run malicious code in the way of creating threads, which does not affect the normal execution of the host program. Dynamic API acquisition increases the difficulty of detection and analysis. In the registry, the startup is completed by setting the normal program as the startup key and then hijacking the required DLL, which will not be detected. Use eventvwr.exe and modify the registry to execute the *. CMD file.

  Protection plan

  • User self test

  User self test

  (1) There are two C: \ windows \ system32 \ 0485 [random] directories, under which there is an EXE file and the DLL or CPL file it needs to run.

  (2) The HKCU \ software \ Microsoft \ windows \ CurrentVersion \ run registry key contains the startup key of the EXE program in the detection method (1).

  (3) Looking at the list of scheduled tasks, you will find the scheduled tasks created by the sample named exe program name in the test method (1).

  (4) The explorer.exe program listens on port 443.

  (5) Check whether the file C: \ users \ username \ appdata \ roaming \ Microsoft \ crypto \ RSA \ s-1-5 - * * is modified

  (6) Check the firewall rules. If you infect the Trojan horse, you will find a rule named "core networking – multicast listener done (icmpv4 in)" and the program name is "C: \ windows \ explorer. Exe".

  2. Green Alliance Technology Trojan kill solution

  • Short term service: Green Alliance Technology Engineer Site Trojan back door cleaning service (manual service + IPS + TAC + terminal protection (Jinshan V8 +)). Ensure to eliminate relevant risk points in the network in the first time, control the impact scope of the event, and provide the event analysis report.
  • Medium term service: provide 3-6 months of risk monitoring and inspection service (IPS + TAC + manual service). This malicious sample has been detected for a long time to protect the security of the customer system.
  • Long term service: Based on industry business risk solutions (threat intelligence + attack traceability + professional security services)

  Sheng Ming

  This safety notice is only used to describe the possible safety problems. Lvmeng technology does not provide any guarantee or commitment for this safety notice. Any direct or indirect consequences and losses caused by the dissemination and use of the information provided by this safety announcement shall be borne by the user himself, and Lvmeng technology and the safety announcement author shall not bear any responsibility for this. Lvmeng technology has the right to modify and interpret the safety announcement. If you want to reprint or disseminate the safety notice, you must ensure the integrity of the safety notice, including the copyright notice and other contents. Without the permission of Lvmeng technology, it is not allowed to modify or increase or decrease the contents of this safety announcement, and it is not allowed to be used for commercial purposes in any way.

  About Green Alliance Technology

  Beijing Shenzhou Lvmeng Information Security Technology Co., Ltd. (referred to as Lvmeng Technology) was founded in April 2000, with its headquarters in Beijing. More than 30 branches are set up at home and abroad to provide core competitive security products and solutions for government, operators, finance, energy, Internet, education, medical and other industry users, so as to help customers realize the safe and smooth operation of business.

  Based on years of security research, Lvmeng technology provides customers with intrusion detection / protection, anti denial of service attack, remote security assessment, web security protection and other products and professional security services in the fields of network and terminal security, Internet basic security, compliance and security management.

  Beijing Shenzhou Lvmeng Information Security Technology Co., Ltd. has been listed and traded on the growth enterprise market of Shenzhen Stock Exchange since January 29, 2014. The stock abbreviation: Lvmeng technology, stock code: 300369.

  If you need to know more, you can join QQ group: 570982169 direct inquiry: 010-68438880