Red Team activities: Finding the cyber security
vulnerabilities before the bad guys do


27 Feb 2019

Red Team activities: Finding the cyber security vu...

In the world of information security, colours play a big part. We have red teams, blue teams and purple teams, and within the red team structures we have white hats, black hats and grey hats.

‘Red’ activities are concerned with offensive security exercises e.g. trying to gain access to an organisation, a network, a system etc. This is done through a number of means, but those you have probably heard of include:

All of these will almost certainly make use, to some extent, of Open Source Intelligence (OSINT), which concerns gathering information about the target from free resources, such as social media accounts, news reports and public records (take a look at our article on social engineering for more information). This may be achieved by physical reconnaissance or by looking online for data about the target, which can then be used to identify vulnerabilities in order to try to gain access.

Let’s delve a bit deeper into what these methods involve, so you can see how they could benefit your organisation:

Vulnerability scanning

A vulnerability scan is a very high-level test which doesn’t go into as much detail as a penetration test. It’s the equivalent of a burglar trying the doors and windows on a house to see if they’re open – and then not going into the house (which would be a penetration test).

This type of scan identifies how an application, website or other system is vulnerable, but it doesn’t tell you what you could do if you exploited the vulnerability.

Penetration testing

A common way of testing web sites and web applications is to run a penetration test. This is where ethical testers—i.e. people with prior written permission from an organisation—run tests to see if they can find vulnerabilities, and find out what would happen if those vulnerabilities are exploited.

Ethical testers are often called white hat hackers while, conversely, people who try to gain access without permission (which is illegal) are called black hat hackers. The names come from the old black and white Western films in the 1950s and 1960s, where the bad guys all wore black hats and the good guys wore white so the audience could tell them apart. In the middle you’ll find those who occupy a murky space between the two - grey hats, for example, are people who test systems without permission (breaking the law) who then ask for money because they were being ‘helpful’ in return for divulging the weaknesses they have found.

Penetration tests can take a number of forms:

  • External: These tests are carried out from outside the network to establish the risks to the organisation from an attack from people outside the organisation’s network.
  • Internal: These tests are carried out from within the network, typically to find out what can be accessed from inside the organisation.
  • Web Application: These tests specifically look for vulnerabilities with any public-facing or internal web applications.

Typically, the testers will provide a report documenting their findings, and the organisation being tested will then fix any issues found by the testers.

Much like taking your car in for an MOT and service, penetration tests should be run on a regular basis, because new vulnerabilities, including zero day threats, are constantly being discovered.

Physical penetration testing

The ‘attacking’ team will make use of social engineering (in the context of information security, this refers to psychological manipulation of people into performing actions or divulging confidential information) as part of their efforts to gain access to a building or premises.

Physical testing is typically engaged by senior management to assess processes—such as visitor registration, tailgating, signing in, staff challenging non-wearers of passes etc.—to see how far a potential intruder could get into a building.

These tests may have a specific objective e.g. to access a specific server in a data centre, or to place a keylogger on a desktop PC to try to capture passwords, or to install a rogue Wi-Fi access to point to capture network traffic.

The intention of these tests is to identify weaknesses in policies, processes, procedures and training, so they can be addressed, and improvements made.

Red-Teaming

Red-teaming is often considered the highest standard of threat emulation and is suited to organisations who have an active security programme and are looking to validate the effectiveness of their approach and the alertness of their defensive solution.

Essentially, a team of offensive security professionals are engaged to perform a specific task; be it compromising a network, accessing a specific file and taking a copy, or gaining access to an individual’s business emails. Typically, an objective is specified and the team’s creativity is unleashed (within limits, of course). This more closely simulates what a genuine attacker would do - explore and search for the easiest way into a target using their skills to create opportunities when none currently exist.

Regardless of whether the team meet the objective, PGI consultants will explain what they did and how this was achieved. This can be compared to any discovered actions to ensure that logging and monitoring levels are sufficient, and to identify the attack taking place, preventing a genuine intruder from taking a similar approach.

An example

One red-teaming technique involves the delivery of a special parcel to the building—marked private and confidential—addressed to a fictitious employee. Within the package is a Wi-Fi-hot spot and 4G modem along with batteries, allowing the red-team to hack the wireless network without entering the target building. They can then leverage this capability for further attacks, such as gaining access to the human resources system and adding a team member to the database as a new employee, who is able to enter the site after being checked by security. This member of the red-team then poses as a member of the IT team and approaches users, asking for them to print out a file that he needs. Once he has obtained a hard copy of the document, he can walk out of the building with the file, having completed his assignment.

How can these assessments benefit your organisation?

Red team activities can identify weaknesses and vulnerabilities in the physical processes and defences in the controls you have in place to protect your online systems. It is better to find these weaknesses yourself than for an attacker to find them, because you are then in a position to put in place better defences, enhancing your controls and protecting your data.

The type of threat changes regularly, new methods of attack are constantly being developed, so it is important that you test your systems regularly.

For more information on how PGI can help you find your vulnerabilities, please contact us: clientservices@pgitl.com or ​​​​​+44 (0)207 887 2699

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