How to find weak passwords in your organization’s Active Directory


Confidentiality is a fundamental information security principle. According to ISO 27001, it is defined as ensuring that information is not made available or disclosed to unauthorized individuals, entities or processes. There are several security controls designed specifically to enforce confidentiality requirements, but one of the oldest and best known is the use of passwords.

In fact, aside from being used since ancient times by the military, passwords were adopted quite early in the world of electronic information. The first recorded case dates to the early 1960s by an operating system created at MIT. Today, the use of passwords is commonplace in most people’s daily lives, either to protect personal devices such as computers and smartphones or to prevent unwanted access to corporate systems.

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With such an ancient security control, it’s only natural to expect it has evolved to the point where passwords are a completely effective and secure practice. The hard truth is that even today, the practice of stealing passwords as a way to gain illegitimate access is one of the main techniques used by cybercriminals. Recent statistics, such as Verizon’s 2020 Data Breach Investigations Report leave no space to doubt: 37% of hacking-related breaches are tied to passwords that were either stolen or used in gaining unauthorized access.

For instance, in a quite recent case, Nippon Telegraph & Telephone (NTT) — a Fortune 500 company — disclosed a security breach in its internal network, where cybercriminals stole data on at least 621 customers. According to NTT, crackers breached several layers of its IT infrastructure and reached an internal Active Directory (AD) to steal data, including legitimate accounts and passwords. This lead to unauthorized access to a construction information management server.

Figure 1: Diagram of the NTT breach (source: NTT)

As with other directory services, Microsoft Active Directory (Read more...)

*** This is a Security Bloggers Network syndicated blog from Infosec Resources authored by Claudio Dodt. Read the original post at:

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