Add_one

Showing posts with label attack. Show all posts
Showing posts with label attack. Show all posts

Sunday, June 24, 2018

Social Engineering - Tactics and Preventions

SOCIAL ENGINEERING


What is Social Engineering?
  • Social engineering is the term used for a broad range of malicious activities accomplished through human interactions.
  • It uses psychological manipulation to trick users into making security mistakes or giving away sensitive information.
  • Social engineering is the art of manipulating users of a computing system into revealing confidential information that can be used to gain unauthorized access to a computer system. 
  • The term can also include activities such as exploiting human kindness, greed, and curiosity to gain access to restricted access buildings or getting the users into installing backdoor software.



Note - What makes social engineering especially dangerous is that it relies on human error, rather than vulnerabilities in software and operating systems.

What are some examples of what social engineers say or do?Criminals will often take weeks and months getting to know a place before even coming in the door or making a phone call. Their preparation might include finding a company phone list or org chart and researching employees on social networking sites like LinkedIn or Facebook. 
There are three ways to do it in an organization are -
1. On Phone Call 
2. In Office
3. Online
SOCIAL ENGINEERING ATTACK TECHNIQUESSocial engineering attacks come in many different forms and can be performed anywhere where human interaction is involved. The following are the five most common forms of digital social engineering assaults.
1. Baiting 
Baiting attacks use a false promise to pique a victim’s greed or curiosity. They lure users into a trap that steals their personal information or inflicts their systems with malware.

2. Scareware
Scareware involves victims being bombarded with false alarms and fictitious threats. Users are deceived to think their system is infected with malware, prompting them to install software that has no real benefit (other than for the perpetrator) or is malware itself. Scareware is also referred to as deception software, rogue scanner software, and fraudwares.

3. Pretexting
Here an attacker obtains information through a series of cleverly crafted lies. The scam is often initiated by a perpetrator pretending to need sensitive information from a victim so as to perform a critical task.
The attacker usually starts by establishing trust with their victim by impersonating co-workers, police, bank and tax officials, or other persons who have right-to-know authority. The pretexter asks questions that are ostensibly required to confirm the victim’s identity, through which they gather important personal data.

4. Phishing
As one of the most popular social engineering attack types, phishing scams are email and text message campaigns aimed at creating a sense of urgency, curiosity or fear in victims. It then prods them into revealing sensitive information, clicking on links to malicious websites, or opening attachments that contain malware.

5. Spear Phishing
This is a more targeted version of the phishing scam whereby an attacker chooses specific individuals or enterprises. They then tailor their messages based on characteristics, job positions, and contacts belonging to their victims to make their attack less conspicuous. Spear Phishing requires much more effort on behalf of the perpetrator and may take weeks and months to pull off. They’re much harder to detect and have better success rates if done skillfully.


NOTE - To perform social engineering attacks for educational purpose you can use Social Engineering Toolkit (SET) in Kali Linux.

How to Defend Yourself from Social Engineers?
Social engineers manipulate human feelings, such as curiosity or fear, to carry out schemes and draw victims into their traps. Therefore, be wary whenever you feel alarmed by an email, attracted to an offer displayed on a website, or when you come across stray digital media lying about. Being alert can help you protect yourself against most social engineering attacks taking place in the digital realm.

  • Don’t open emails and attachments from suspicious sources – If you don’t know the sender in question, you don’t need to answer an email. Even if you do know them and are suspicious about their message, cross-check and confirm the news from other sources, such as via telephone or directly from a service provider’s site. Remember that email addresses are spoofed all of the time; even an email purportedly coming from a trusted source may have actually been initiated by an attacker.
  • Use multifactor authentication – One of the most valuable pieces of information attackers seek are user credentials. Using multifactor authentication helps ensure your account’s protection in the event of system compromise. Imperva Incapsula Login Protect is an easy-to-deploy 2FA solution that can increase account security for your applications.
  • Be wary of tempting offers – If an offer sounds too enticing, think twice before accepting it as fact. Googling the topic can help you quickly determine whether you’re dealing with a legitimate offer or a trap.
  • Keep your antivirus/antimalware software updated – Make sure automatic updates are engaged, or make it a habit to download the latest signatures first thing each day. Periodically check to make sure that the updates have been applied, and scan your system for possible infections.

Friday, June 22, 2018

Computer Virus - Types and Precautions

VIRUS - TYPES AND PRECAUTIONS



Virus is a malicious software program "Malware" that can infect a computer by modifying or deleting data files, boot sector of the hard disk drive or cause a software to work in an unexpected manner.
A computer virus resides on a host computer and can replicate itself when executed. The virus can steal user data, record keystrokes & web sessions of a user.
Cause of Virus -
The following are the main causes of a Computer Virus.
1. Infected Flash Drives or Disks
Flash drives and disks are the main cause of spreading viruses. A virus can also be copied from one computer to other when the user copies infected files using flash drives and disks.
2. Email Attachments
Most of the viruses spread through emails. The email attachment is a file that is sent along with an email. An email may contain an infected file attachment. The virus can spread if the users open and download an email attachment. It may harm the computer when it is activated. It may destroy files on the hard disk or may send the virus automatically to all email addresses saved in the address book.
3. Infected / Pornography websites
Thousands of insecure websites can infect the computer with viruses. Most of the websites with pornographic materials are infected, so by visiting these websites the user’s computer also gets infected by a virus. These websites are developed to spread viruses or other unethical material. The virus is transferred to the user’s computer when this material is downloaded. These websites may access the computer automatically when the users visit them.
4. Networks
The virus can spread if an infected computer is connected to a the network. The internet is an example of such network. When a user downloads a file infected with a virus from the internet, the virus is copied to the computer. It may infect the files stored on the computer.
5. Pirated Softwares
An illegal copy of the software is called pirated software. A virus can spread if a user installs pirated software that contains a virus. A variety of pirated software is available in CDs and from the internet. Some companies intentionally add virus in the software. The virus is automatically activated if the user uses the software without purchasing a license.
Types of Virus -
There are various types of virus known to this time are -
1. Boot Sector Virus
Even though this virus has now become obsolete, it still pops out in one way or the other. This virus got attention when floppy disks were used to boot a computer. In modern computers, this virus could appear on the “Master Boot Record”. In the partitioned storage device of your computer, it is the first sector to take place. However, thanks to the fact evolution of the Internet, the threat of this virus is now mitigated.
2. Web Scripting Virus
Similar to the hyperlinks that we used in Microsoft Word, many websites rest on codes to provide engaging content to their users. For example, since the trends of watching videos online have now become very popular – more than 2 Billion Videos are streamed on Facebook every day, these videos also execute a specific code. 
These codes can be exploited and it is very troublesome to note that this exploitation has taken place on some very notable sites. All the hackers have to do it to leave a comment in the Comments Section of the website which contains that code. Thus, even without the Webmaster knowing it, the code gets exerted into the site.
3. Browser Hijacker
Ever faced a problem where the homepage of your web page gets automatically directed to a particular site? Well, that is the most common way by which this ransomware hijacks your browser.
While its visual effects might epitomize the threat, this hijacker is nothing more than a tactic to increase income from web ads. 
4. Resident Virus
After inserting itself directing into the memory of your system, this virus has the capability to take a number of actions. One of its more troublesome features is its ability to run away. Leaving behind the file which was originally infected, this virus has the ability to run on its own.

5. Direct Action Virus

Similar to the Vienna virus which shocked computers in 1998, this virus comes into action after you have executed the file. The load is delivered to your computer and the virus becomes active.
However, this virus has a limitation. It takes no action unless the file which is infected gets implemented again.

6. Polymorphic Virus

One of the factors that epitomize the usefulness of this virus is its ability to evade. The Antivirus programs that are enabled on our computers detect the presence of any virus by detecting its code.
The polymorphic virus has exploited this limitation beautifully as it changes its code every time the infected file is executed. Thus, it becomes nearly impossible for any ordinary antivirus to track it down.

7. File Infector Virus

Although the word “file” in its name might suggest otherwise, this virus does not take the help of files every time. In fact, the file is only the starting point as the file infector dwarfs the first file after which it re-writes the file.

8. Multipartite Virus

If you have read carefully the aforementioned viruses, you might have noticed that they use two methods for their transmission. Either they use one method or a single payload is delivered.
However, this virus wants to claim both. Depending upon the operating system of your computer or the files that exist on your computer, it might use any of the two methods to spread.

9. Macro Virus

Appearing in the form of a word document which seemingly links the user to pornographic websites, Melissa is one of the most known Micro Virus. Going one step further, this virus not only exploits the user but also his/her friends by mailing the copies of the infected virus document to the contact list.
Some Common Well-known Viruses are -
1. Code Red
It is a worm that infects a computer running Microsoft IIS server. This virus launched DOS attack on White House’s website. It allows the hacker to access the infected computer remotely.
2. Nimba
It is a worm that spreads itself using different methods. IT damages the computer in different ways. It modified files, alters security settings and degrades performance.
3. SirCam
It is distributed as an email attachment. It may delete files, degrade performance and send the files to anyone.
4. Melisa
It is a virus that is distributed as an email attachment. IT disables different safeguards in MS Word. It sends itself to 50 people if Microsoft Outlook is installed.
5. Ripper
It corrupts data from the hard disk.
6. MDMA
It is transferred from one MS Word file to other if both files are in memory.
7. Concept
It is also transferred as an email attachment. It saves the file in template directory instead of its original location.
8. One_Half
It encrypts hard disk so only the virus may read the data. It displays One_Half on the screen when the encryption is half completed.

Protection from Computer Virus

The virus infects computer system if the latest and updated version of an Antivirus program is not installed. Latest Antivirus software should be installed on Computer to protect it from viruses. 
A computer system can be protected from the virus by following these precautions.
  1. The latest and updated version of Anti-Virus and firewall should be installed on the computer.
  2. The Anti-Virus software must be upgraded regularly.
  3. USB drives should be scanned for viruses, and should not be used on infected computers.
  4. Junk or unknown emails should not be opened and must be deleted straight away.
  5. Unauthorized or pirated software should not be installed on the computer.
  6. An important way of protection against the virus is the use of back up of data. The backup is used if the virus deletes data or modifies it. So back up your data on regular basis. There is some great software that can back up your data automatically.
  7. Freeware and shareware software from the internet normally contain viruses. It is important to check the software before using them.
  8. Your best protection is your common sense. Never click on suspicious links, never download songs, videos or files from suspicious websites. Never share your personal data with people you don’t know over the internet.

Here is a Small Tutorial about How to make Simple Viruses - Click this Link

News! New Hacking Tools - 2018 - Target Exploits and Vulnerabilities Easily

New Hacking Tools - 2018 With Increase in Technology, Increase the demand for Cyber Security and it is also essential to develop the ...