Applicable

(Y)es / (N)o

(C)onfidentiality

(I)ntegrity

(A)vailability

RPN

(C+I+A)

(S)atisfactory

L1

M2

H3

L1

M2

H3

L1

M2

H3

(O)ther than satisfactory +##

si-4(18)

information system monitoring  | analyze traffic / covert exfiltration

assessment objective:

Determine if the organization:

si-4(18)[1]

defines interior points within the system (e.g., subsystems, subnetworks) where communications traffic is to be analyzed;

si-4(18)[2]

to detect covert exfiltration of information, analyzes outbound communications traffic at:

si-4(18)[2][a]

the external boundary of the information system (i.e., system perimeter); and

si-4(18)[2][b]

organization-defined interior points within the system.

potential assessment methods and objects:

Examine: [select from: System and information integrity policy; procedures addressing information system monitoring tools and techniques; information system design documentation; network diagram; information system monitoring tools and techniques documentation; information system configuration settings and associated documentation; information system monitoring logs or records; information system audit records; other relevant documents or records].

Interview: [select from: System/network administrators; organizational personnel with information security responsibilities; organizational personnel installing, configuring, and/or maintaining the information system; organizational personnel with responsibility for monitoring the information system; organizational personnel with responsibility for the intrusion detection system].

Test: [select from: Organizational processes for intrusion detection/information system monitoring; automated mechanisms supporting and/or implementing intrusion detection/system monitoring capability; automated mechanisms supporting and/or implementing analysis of outbound communications traffic].