Research Article

Identification of ICS Security Risks toward the Analysis of Packet Interaction Characteristics Using State Sequence Matching Based on SF-FSM

Table 5

Examples of signatures.

Type of sequence signatureExamplesClient belonging to

Independent sequence signatureList Identity (Req)Molex EIP_Tools

Correlative sequence signatureCustomized Service 0x5C (Req)
Customized Service 0x4B (Req)
Customized Service 0x4B (Req)
Customized Service 0x4B (Req)
Customized Service 0x4C (Req)
Customized Service 0x4C (Req)
RSLogix 5000

Cyclic sequence signatureMultiple Service Packet, ∣ Get Attribute ListRSLogix 5000

Pipeline sequence signatureList Services (Req)
List Interfaces (Req)
RSLogix 5000