Adversaries may target and collect data from information repositories. This can include sensitive data such as specifications, schematics, or diagrams of control system layouts, devices, and processes. Examples of information repositories include reference databases or local machines in the process environment, as well as workstations and databases in the corporate network that might contain information about the ICS.  Information collected from these systems may provide the adversary with a better understanding of the operational environment, vendors used, processes, or procedures of the ICS. In a campaign between 2011 and 2013 against ONG organizations, Chinese state-sponsored actors searched document repositories for specific information such as, system manuals, remote terminal unit (RTU) sites, personnel lists, documents that included the string SCAD*, user credentials, and remote dial-up access information. 
Consider periodic reviews of accounts and privileges for critical and sensitive repositories.
|M0941||Encrypt Sensitive Information|
|M0926||Privileged Account Management||
Minimize permissions and access for service accounts to limit the information that may be exposed or collected by malicious users or software. 
|M0922||Restrict File and Directory Permissions|
|M0918||User Account Management||
Ensure users and user groups have appropriate permissions for their roles through Identity and Access Management (IAM) controls to prevent misuse. Implement user accounts for each individual that may access the repositories for role enforcement and non-repudiation of actions.
Develop and publish policies that define acceptable information to be stored in repositories.
|ID||Data Source||Data Component|
|DS0015||Application Log||Application Log Content|
|DS0028||Logon Session||Logon Session Creation|