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Beginners guide to Computer forensics

Hello aspiring cyber forensic invetigators. In our previous blogpost, you learnt what is digital forensics, types of digital forensics and stages of a digital forensic investigation. In this article, you will learn about computer forensics, one of the branches of digital forensics.

What is computer forensics?

Computer forensics (often interchangeably and mistakenly used with digital forensics) is a branch of digital forensics in which the digital evidence is collected and analyzed from computer systems like workstations, servers and Laptops. It is a process of identifying, preserving, analyzing and presenting digital evidence in a way that is legally sound but focussed on computers, hard drives and data storage systems.

The goal of computer forensics is to:

  • Investigate digital crimes
  • Recover lost or hidden data
  • Understand how a breach or attack occurred
  • Support legal proceedings with solid digital evidence

Just like physical detectives collect fingerprints or DNA, computer forensic investigators collect digital footprints like logs, browser history, downloads, recent files, emails, file metadata, internet activity, user activity, login activity, running processes. programs and open network connections etc.

Common Steps in a Computer Forensics Investigation

Although every case is different, most computer forensics investigations follow the same process every digital forensic investigation has to follow. Here’s a simplified breakdown:

1. Identification:

Determine the computer devices on which digital evidence can be present. Then, identify what data needs to be examined and where it’s stored. This might involve computers, hard drives, RAM etc.

2. Acquisition and Preservation:

Next important step is to acquire the evidence and preserve it without the fear of contamination. Forensics experts often create a forensic image — an exact, bit-by-bit copy of a device — to work from, while preserving the original. Hard disks of computers can be imaged using tools like dd, dcfldd, Guymager, FTK Imager etc. Forensic images of RAM can be taken using tools like DumpIt, WinPmem, Magnet RAM capture for Windows, LiME, Compile and Load, AVML for Linux and OSXPmem for macOS.

The preservation of the forensic image can be achieved using hashing tools and write blockers. Some of the hashing tools are sha256sum, CertUtil, Get-FileHash etc.

3. Analysis:

This is the deep dive. Investigators look through files, logs, emails, browser history and other data sources to find relevant evidence to a data breach or cybercrime. Analysis should always be done on the forensic image and not on the original.

Generally forensic analysis involves file carving, timeline analysis, Partition and volume analysis, RAM analysis, examining metadata etc. Some of the tools used here are Foremost, Scalpel, TestDisk for carving, fdisk and Autopsy for partition and volume analysis, Log2timeline, Plaso, Timesketch for timeline analysis and Volatility for RAM analysis.

4 Documentation

The computer forensic investigation procedure from the beginning needs to be carefully recorded and documented to ensure that the evidence can be used in court. Even small mistakes in this step could lead to evidence being thrown out.

5. Reporting:

Investigators should prepare a detailed report explaining what was found, how it was found and what it means. This will be useful in legal proceedings or internal investigations.

Uses of computer forensics

Computer forensics plays an important role in:

  • Law enforcement: To investigate crimes like fraud, hacking, identity theft, or online harassment.
  • Businesses: To examine data breaches, insider threats or employee misconduct.
  • Cybersecurity teams: To analyze how attackers got in and what data was affected.
  • Legal cases: To gather digital evidence for civil lawsuits or intellectual property disputes.

As the threat of data breaches, cyber crimes, identity theft cases increase exponentially, the importance of digital evidence — and the people who know how to handle it — will only grow. Whether you want to protect your business, support law enforcement, or start a career in cybersecurity, learning computer forensics is a smart step forward. Next, learn about mobile forensics, another important branch of digital forensics.

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Beginners guide to Purple Teaming

Hello, aspiring ethical hackers. In our previous blogposts, you learnt about Blue Teaming and Red Teaming. In this article. you will learn what is Purple Teaming, why it matters and how to get started in Purple teaming.

In the ever-evolving world of cybersecurity, staying ahead of attackers is a constant challenge. Traditionally, organizations split their security efforts between two distinct groups: the Red Team, who simulate attacks to find vulnerabilities, and the Blue Team, who defend networks and respond to incidents. But what if these two teams worked together — seamlessly sharing insights and strategies to build a stronger, smarter defense?

What is Purple Teaming?

Purple Teaming is the practice of combining the offensive tactics of the Red Team with the defensive strategies of the Blue Team. The name comes from mixing the colors red and blue to create purple, symbolizing the integration of attack and defense.

Unlike a traditional Red Team vs. Blue Team setup, where each group operates somewhat independently, the purple team approach fosters ongoing communication and collaboration. This way, vulnerabilities discovered by the Red Team can be immediately addressed by the Blue Team and defensive measures can be tested and refined in real-time.

Why is Purple Teaming important?

Here are a few reasons purple teaming is becoming essential in cybersecurity.

1. Improved Security Posture:

By combining insights from both attackers and defenders, purple teams help organizations identify and close gaps faster. It’s no longer a matter of “who found what,” but rather how both teams can learn from each other to build a stronger security posture.

2. Faster Response and Remediation:

When the Red Team discovers an exploit or attack path, the Blue Team can instantly develop countermeasures. This reduces the window of vulnerability and minimizes potential damage from real attackers.

3. Enhanced Threat Detection:

Purple teams help fine-tune detection tools like SIEMs (Security Information and Event Management) and EDRs (Endpoint Detection and Response) by testing alerts against real-world attack techniques. This reduces false positives and sharpens the team’s ability to spot genuine threats.

4. Better use of resources:

Instead of working in silos, purple teams leverage each other’s skills and tools. This not only improves efficiency but also fosters a security culture focused on shared goals.

How does Purple Teaming work in practice?

Purple teaming isn’t a just a formal job title or role — it’s a collaborative process that involves people, tools and workflows. Here’s what it typically looks like:

1. Planning and Goal setting:

Red and Blue teams agree on objectives — for example, testing the effectiveness of phishing defenses or evaluating how well the network detects lateral movement.

2. Simulated Attacks:

The Red Team performs controlled attack simulations based on agreed scenarios. They might try phishing campaigns, exploit vulnerabilities, or attempt privilege escalation — all in a monitored environment.

3. Monitoring and Detection:

The Blue Team watches the network, endpoint and security tools to see if the simulated attacks are detected, blocked or logged. They gather data on alerts, response times and gaps in coverage.

4. Joint Analysis:

Both teams review the results together. The Red Team explains attack techniques and where they succeeded or failed. The Blue Team shares how they detected or missed events and discusses improvements.

5. Improvement and Iteration:

The Blue Team adjusts detection rules, hardens defenses or changes response workflows. The Red Team adapts tactics based on updated defenses. This cycle repeats continuously improving the organization’s security.

Tools used in Purple Teaming

Purple teaming doesn’t have separate tools for itself. Tools like Cobalt Strike, Metasploit or open-source frameworks like Atomic Red Team are used by Red Teams to emulate real-world attacks while solutions such as Splunk, ELK Stack or Microsoft Sentinel help Blue Teams analyze logs and tune alerts. Communication and documentation tools like Jira, Confluence or even shared chat platforms like Slack enable smooth teamwork. Emerging tools such as Verodin (acquired by FireEye) and SafeBreach provide automated purple teaming workflows, bridging attack simulations with defense validation.

The future is Purple

Purple teaming represents a shift in cybersecurity mindset — from adversarial to collaborative. By breaking down silos between Red and Blue teams, organizations gain faster insights, stronger defenses and a proactive security culture. Next, learn about Threat Hunting.

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Beginners guide to Blue Teaming

Hello aspiring Blue teamers. In our previous blogpost, you learnt what is Red teaming. In this article, you will learn what Blue Teaming or Blue Team hacking is, what Blue Teams do and how you can get started in this essential field of cybersecurity.

In today’s connected world, protecting your digital assets is just as important as growing your business. Every day, organizations face threats from hackers, malware, Advanced Persistent Threats (APTs) and even insider threats. While attackers often get the spotlight, the real heroes are the ones quietly defending in the background — the Blue Team.

What is Blue Teaming?

Have you ever wondered who protects networks from being hacked, who investigates cyber incidents or who sets up the defenses that keep organizations safe — that’s the Blue Team.

Blue Teaming refers to the defensive side of cybersecurity. A Blue Team’s mission is to detect, respond to and defend against cyber threats. While the Red Team acts like attackers — trying to break into systems — the Blue Team protects those systems and makes them stronger over time.

The Blue Team sets up firewalls and other defensive technologies, monitors systems for unusual behavior, investigates alerts and responds to incidents — all to keep data and infrastructure safe from real-world threats.

How does a Blue Team protect the network?

Blue Teams are involved in a wide range of activities to ensure the security and resilience of an organization’s digital systems. Here are some of their core responsibilities.

1. Network monitoring:

Blue Teams always monitor the network traffic using tools in real-time. They look for any signs of unusual activity — like a user logging in from an unfamiliar location or data being transferred at odd hours.

2. Threat detection:

They also analyze logs, alerts and data to detect threats early. This includes identifying malware infections, phishing attempts or suspicious behavior by insiders.

3. Incident Response:

When a malicious activity occurs, like a breach or ransomware attack — the Blue Team investigates what happened, stops or tries to mitigate the damage and helps the organization recover.

4. Security Hardening:

They make systems more secure by configuring firewalls, updating software, disabling unnecessary services and applying the principle of least privilege (giving users only the access they truly need).

5. Security Awareness:

Blue Teams also train employees on how to spot phishing emails, avoid risky behavior and follow security best practices. Human error is one of the biggest cybersecurity risks.

6. Digital forensics:

If a system is compromised, the Blue Team gathers and analyzes digital evidence to understand the attack and prevent it from happening again.

Importance of Blue Teaming

Cyber threats are only going to increase and grow more sophisticated. These can vary from ransomware gangs targeting hospitals to phishing emails trying to steal banking information. Without Blue Teaming, these attacks would succeed more often and cause even more damage.

Here’s why Blue Teaming is important. They protect sensitive data like financial records, personal information, and trade secrets. They respond to emergencies, minimizing the impact of attacks. They continuously improve defenses, making systems stronger over time. They help organizations meet compliance requirements (e.g., GDPR, HIPAA, ISO).

Common Blue Team Tools

Blue Teams use a wide range of tools and platforms to do their job. Some popular ones include:

  • 1. SIEM Tools (Security Information and Event Management):
    e.g., Splunk, IBM QRadar or Elastic Security — used for log analysis and threat detection.
  • 2. Endpoint Detection & Response (EDR):
    e.g., CrowdStrike, SentinelOne — used to monitor and protect devices like laptops and servers.
  • 3. Firewalls and IDS/IPS (Intrusion Detection/Prevention Systems):
    e.g., Palo Alto, Snort — help block unauthorized access and detect intrusions.
  • 4. Packet Analyzers:
    e.g., Wireshark — used to inspect network traffic at a detailed level.
  • 5. Threat Intelligence Platforms:
    Used to stay updated on the latest attacker tactics and threat indicators.

Red Teaming vs Blue Teaming

People often get confused with Red teaming and Blue teaming. While both are used to improve the security posture of an organization, they have some differences. They are,

How to get started in Blue Teaming?

If you’re interested in joining a Blue Team or building one for your organization, here are some beginner-friendly steps:

1. Learn the basics of networking:

Learn and try to understand how data moves through networks. Learn about OSI model, TCP/IP, DNS, Firewalls and VPNs.

2. Get comfortable with operating systems:

Blue Teams often need to work with both Windows and Linux systems. So, learn basic commands, file structures and system logs etc.

3. Learn Cybersecurity fundamentals:

Learn about various cybersecurity fundamentals.

4. Earn Certifications:

Certifications like CompTIA Security+, Cisco’s CCNA, or Certified SOC Analyst (CSA) are great starting points.

5. Practice Detection and Response:

Set up your own lab at home. Use open-source tools like Security Onion to monitor and analyze traffic.

The digital world needs more defenders. Whether you’re a student exploring cybersecurity, an IT professional looking to specialize, or a business leader wanting to strengthen your team — Blue Teaming is a powerful, rewarding path.

As threats evolve, the need for sharp, prepared, and proactive defenders has never been greater. Next, learn about Purple teaming.

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Beginners guide to Red Teaming


Hello, aspiring ethical hackers. In our previous blogpost, you learnt about pen testing. In this article, you will learn about Red Teaming or Red team hacking.

What is Red Teaming?

In today’s digital landscape, cyber threats are constantly evolving becoming more sophisticated and more dangerous day-by-day. Organizations can no longer rely solely on traditional security measures like a simple pen test, technologies like firewalls, antivirus software etc to keep their organization secure. To stay ahead of potential attackers, a proactive, adversarial approach to cybersecurity is needed. This approach is known as Red teaming or Red team hacking.

Red Teaming is a simulated cyberattack conducted by cybersecurity professionals who emulate the tactics, techniques and procedures (TTPs) of real-world hackers like threat actors, cyber criminal groups and Advanced Persistent Threats (APTs). A Red team operation mimics real-world attacks to uncover vulnerabilities in an organization before malicious hackers do. The goal of a Red Team test is to test how well an organization can detect, prevent and respond to an actual cyberattack. It goes beyond typical penetration testing by focusing not just on vulnerabilities, but on people, processes, and technology—the three pillars of organizational defense.

To perform a Red team test, usually multiple members with various skills are required. They are together called as a Red team. Unlike vulnerability scans, pen tests or compliance audits, Red Team exercises are unannounced and designed to test the organization as a whole. This includes the security team’s ability to detect intrusions, the effectiveness of incident response protocols and even the awareness of non-technical staff.

Phases of a Red Team Exercise

Just like a pen test, a Red team exercise or operation has different phases. They are,

  1. Setting objective (s): A Red team exercise begins by setting a specific goal first. The goal could be exfiltration of organization’s data, taking full control of the network or particular device etc.
  2. Reconnaissance: After seeing the goal, the next step involves gathering as much information about the target organization such as public records, information available in social media and any other source. Needless to say, the acquired information should assist in the next step.
  3. Initial access: Gaining initial access to the target organization either by using phishing, malware or by exploiting a vulnerability.
  4. Privilege escalation: After gaining initial access, elevating privileges from a low-privileged user account to higher-level access is the next step.
  5. Lateral movement: Once, high privileges are acquired, the next step is to pivot through the target network to reach valuable assets.
  6. Completing objective: Achieving the goal of the operation such as data exfiltration, domain control or persistence.

Importance of Red Teaming

The primary objective of Red Teaming is not just to gain initial access but to demonstrate the potential impact of a successful breach. This helps organizations to,

  1. Identify real-world risks: By emulating actual adversaries, Red Teams reveal how a breach could happen in real-world, not just in theory.
  2. Improve detection and response – Red Team exercises highlight gaps in monitoring and response, allowing organizations to improve their security operations.
  3. Test assumptions – Many organizations overestimate their defensive capabilities. Red Teaming provides a reality check.
  4. Enhance training – These exercises serve as hands-on experience for defenders, offering invaluable lessons that go beyond textbooks and simulations.
  5. Validate controls – Red Teaming puts controls like firewalls, IDS, IPS etc to the test.

Red Teaming vs Penetration Testing

Although they are often used interchangeably, Red Teaming and penetration testing have a lot of differences. They are,

Red Team vs Blue Team

In cybersecurity, just like “Red Team” there is another team called “Blue Team”. While “Red Team” represents the attackers, “Blue Team” represents the defenders—the organization’s internal security staff. In some scenarios, there is also a “Purple Team” that acts as a bridge between “Red Team” and “Blue Team”, facilitating communication and helping both sides learn from the exercise.

While penetration testing is great for uncovering known vulnerabilities in systems, Red Teaming is about thinking like an attacker and exploiting weaknesses across the organization in a stealthy, goal-oriented way.

Ethical and Legal considerations

Red Teaming, just like penetration testing must be conducted under strict rules of engagement (ROE). These rules define what is and isn’t allowed, ensuring that the simulation doesn’t disrupt business operations or violate legal or ethical boundaries. Consent from senior leadership is essential, and the results must be handled with confidentiality and care. Next, learn about Blue teaming.


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Beginners guide to Recon-ng

Hello, aspiring ethical hackers. In our previous blogpost, you learnt in detail about OSINT. In this article, you will learn about Recon-ng, a OSINT gathering tool.

Recon-ng is an open-source intelligence gathering tool aimed at reducing the time spent harvesting information from open sources. It is a full-featured reconnaissance framework designed to gather OSINT information very quickly.

Let’s see how this tool works. For this, we will be using Kali Linux as Recon-ng is installed by default on it. This tool can be started using command shown below.

recon-ng

If you notice the above images, the interface of Recon-ng is similar to Metasploit. It has been designed in such a way to decrease the learning curve. You can create different workspaces in Recon-ng. To create a new workspace, you have to use the command shown below.

workspaces create <name of workspace>

For example, we have created a new workspace named “hc_test”. The various framework items of Recon-ng that are useful to us can be seen using command shown below.

show

For this tutorial, let’s gather information about a domain. To do this, we need to first add a domain. This can be done using command shown below.

db insert domains

Now, you can see the domains you added using command shown below.

show domains

Similarly you can add and view other items too in similar manner. Just like Metasploit, Recon-ng has various modules each performing a specific function. You need to first add these modules to Recon-ng to be able to use them. This modules are found in ‘marketplace’ and can be viewed using command shown below.

marketplace search

This will list all available modules. Searching for the module we want can be laborious and in some cases nothing less than searching for needle in haystack. But don’t worry. You can even search for modules you want. For example, let’s search for Whois related modules. This can be done as shown below.

marketplace search <search term>

From here, you can install any module we want. This can be done using command shown below. For example, let’s install the recon/domain-contents/ whois-pocs/ module.

marketplace install <module>

Similarly, you can install other modules we want in the same way from the market place. Once they are installed, you can search for all installed modules using the command shown below.

modules search

To load a module, we use command as shown below.

modules load <module_name>

For example. let’s load the module we just installed.

Once the modules is loaded, you can view information about the module using the “info” command as shown below.

As you can read in the above module, this module retrieve poc data about a domain for Whois queries. Since we have already added a domain, all you have to do is execute the module using command “run”.

As you can see, the module retrieved contact information belonging to the domain we queried. This information contains first name, second name and email addresses of 46 contacts belonging to the domain (The retrieved data has been hidden for the purpose of privacy). This information can be useful while phishing or spear-phishing our targets.

In the same manner, we can retrieve other OSINT information using recon-ng. Next, learn how to perform OSINT using Maltego.