Prevent Downlink

Threat actors may target the downlink connections to prevent the victim spacecraft from sending telemetry to the ground controllers. Telemetry is the only method in which ground controllers can monitor the health and stability of the spacecraft while in orbit. By disabling this downlink, threat actors may be able to stop mitigations from taking place.

ID: CM0029
Related Aerospace Threat IDs:  SV-AV-1
Related MITRE ATT&CK TTPs:  T1464 T1489 T1562
Related ESA SPACE-SHIELD TTPs: 
Tactic:
Created: 2022/10/19
Last Modified: 2022/12/08

Countermeasures

ID Name Description NIST Rev5 D3FEND ISO 27001
CM0002 COMSEC A component of cybersecurity to deny unauthorized persons information derived from telecommunications and to ensure the authenticity of such telecommunications. COMSEC includes cryptographic security, transmission security, emissions security, and physical security of COMSEC material. It is imperative to utilize secure communication protocols with strong cryptographic mechanisms to prevent unauthorized disclosure of, and detect changes to, information during transmission. Systems should also maintain the confidentiality and integrity of information during preparation for transmission and during reception. Spacecraft should not employ a mode of operations where cryptography on the TT&C link can be disabled (i.e., crypto-bypass mode). The cryptographic mechanisms should identify and reject wireless transmissions that are deliberate attempts to achieve imitative or manipulative communications deception based on signal parameters. AC-17 AC-17(1) AC-17(10) AC-17(10) AC-17(2) AC-18 AC-18(1) AC-2(11) AC-3(10) CA-3 IA-4(9) IA-5 IA-5(7) IA-7 PL-8 PL-8(1) SA-8(18) SA-9(6) SC-10 SC-12 SC-12(1) SC-12(2) SC-12(3) SC-12(6) SC-13 SC-16(3) SC-28(1) SC-28(3) SC-7 SC-7(10) SC-7(11) SC-7(18) SC-7(5) SC-8(1) SC-8(3) SI-10 SI-10(3) SI-10(5) SI-10(6) SI-19(4) SI-3(8) D3-ET D3-MH D3-MAN D3-MENCR D3-NTF D3-ITF D3-OTF D3-CH D3-DTP D3-NTA D3-CAA D3-DNSTA D3-IPCTA D3-NTCD D3-RTSD D3-PHDURA D3-PMAD D3-CSPP D3-MA D3-SMRA D3-SRA A.5.14 A.6.7 A.8.1 A.8.16 A.5.14 A.8.1 A.8.20 A.5.14 A.8.21 A.5.16 A.5.17 A.5.8 A.5.14 A.8.16 A.8.20 A.8.22 A.8.23 A.8.26 A.8.12 A.5.33 A.8.20 A.8.24 A.8.24 A.8.26 A.5.31 A.5.33 A.8.11
CM0005 Ground-based Countermeasures This countermeasure is focused on the protection of terrestrial assets like ground networks and development environments/contractor networks, etc. Traditional detection technologies and capabilities would be applicable here. Utilizing resources from NIST CSF to properly secure these environments using identify, protect, detect, recover, and respond is likely warranted. Additionally, NISTIR 8401 may provide resources as well since it was developed to focus on ground-based security for space systems (https://nvlpubs.nist.gov/nistpubs/ir/2022/NIST.IR.8401.ipd.pdf). Furthermore, the MITRE ATT&CK framework provides IT focused TTPs and their mitigations https://attack.mitre.org/mitigations/enterprise/. Several recommended NIST 800-53 Rev5 controls are provided for reference when designing ground systems/networks. AC-1 AC-10 AC-11 AC-11(1) AC-12 AC-12(1) AC-14 AC-16 AC-16(6) AC-17 AC-17 AC-17(1) AC-17(10) AC-17(2) AC-17(3) AC-17(4) AC-17(6) AC-17(9) AC-18 AC-18 AC-18(1) AC-18(3) AC-18(4) AC-18(5) AC-19 AC-19(5) AC-2 AC-2 AC-2(1) AC-2(11) AC-2(12) AC-2(13) AC-2(2) AC-2(3) AC-2(4) AC-2(9) AC-20 AC-20(1) AC-20(2) AC-20(3) AC-20(5) AC-21 AC-22 AC-3 AC-3(11) AC-3(13) AC-3(15) AC-3(4) AC-4 AC-4(23) AC-4(24) AC-4(25) AC-4(26) AC-4(31) AC-4(32) AC-6 AC-6(1) AC-6(10) AC-6(2) AC-6(3) AC-6(5) AC-6(8) AC-6(9) AC-7 AC-8 AT-2(4) AT-2(4) AT-2(5) AT-2(6) AT-3 AT-3(2) AT-4 AU-10 AU-11 AU-12 AU-12(1) AU-12(3) AU-14 AU-14(1) AU-14(3) AU-2 AU-3 AU-3(1) AU-4 AU-4(1) AU-5 AU-5(1) AU-5(2) AU-5(5) AU-6 AU-6(1) AU-6(3) AU-6(4) AU-6(5) AU-6(6) AU-7 AU-7(1) AU-8 AU-9 AU-9(2) AU-9(3) AU-9(4) CA-3 CA-3 CA-3(6) CA-3(7) CA-7 CA-7(1) CA-7(6) CA-8 CA-9 CM-10(1) CM-11 CM-11 CM-11(2) CM-11(3) CM-12 CM-12(1) CM-14 CM-2 CM-2(2) CM-2(3) CM-2(7) CM-3 CM-3(1) CM-3(2) CM-3(5) CM-3(7) CM-3(7) CM-3(8) CM-4 CM-5(1) CM-5(5) CM-6 CM-6(1) CM-6(2) CM-7 CM-7(1) CM-7(2) CM-7(3) CM-7(5) CM-7(8) CM-7(8) CM-7(9) CM-8 CM-8(1) CM-8(2) CM-8(3) CM-8(4) CM-9 CP-10 CP-10(2) CP-10(4) CP-2 CP-2 CP-2(2) CP-2(5) CP-2(8) CP-3(1) CP-4(5) CP-8 CP-8(1) CP-8(2) CP-8(3) CP-8(4) CP-8(5) CP-9 CP-9(1) CP-9(2) CP-9(3) IA-11 IA-12 IA-12(1) IA-12(2) IA-12(3) IA-12(4) IA-12(5) IA-12(6) IA-2 IA-2(1) IA-2(12) IA-2(2) IA-2(5) IA-2(6) IA-2(8) IA-3 IA-3(1) IA-4 IA-4(9) IA-5 IA-5(1) IA-5(13) IA-5(14) IA-5(2) IA-5(7) IA-5(8) IA-6 IA-7 IA-8 IR-2 IR-2(2) IR-2(3) IR-3(3) IR-4 IR-4(1) IR-4(11) IR-4(11) IR-4(12) IR-4(13) IR-4(14) IR-4(3) IR-4(4) IR-4(5) IR-4(6) IR-4(7) IR-4(8) IR-5 IR-5(1) IR-6 IR-6(1) IR-7 IR-7(1) MA-2 MA-3 MA-3(1) MA-3(2) MA-3(3) MA-4 MA-4(1) MA-4(3) MA-4(6) MA-4(7) MA-5(1) MA-6 MA-7 MP-2 MP-3 MP-4 MP-5 MP-5(4) MP-6 MP-6(3) MP-7 PE-3(7) PL-10 PL-11 PL-8 PL-8(1) PL-8(2) PL-9 PL-9 PM-11 PM-16(1) PM-17 PM-30 PM-30(1) PM-31 PM-32 RA-10 RA-3(1) RA-3(2) RA-3(2) RA-3(3) RA-3(4) RA-5 RA-5(10) RA-5(11) RA-5(2) RA-5(4) RA-5(5) RA-7 RA-9 RA-9 SA-10 SA-10(1) SA-10(7) SA-11 SA-11 SA-11(2) SA-11(4) SA-11(7) SA-11(9) SA-15 SA-15(3) SA-15(7) SA-17 SA-17 SA-2 SA-2 SA-22 SA-3 SA-3 SA-3(1) SA-3(2) SA-3(2) SA-4 SA-4 SA-4(1) SA-4(10) SA-4(12) SA-4(2) SA-4(3) SA-4(3) SA-4(5) SA-4(5) SA-4(7) SA-4(9) SA-4(9) SA-5 SA-8 SA-8 SA-8(14) SA-8(15) SA-8(18) SA-8(21) SA-8(22) SA-8(23) SA-8(24) SA-8(9) SA-9 SA-9 SA-9(1) SA-9(2) SA-9(6) SA-9(7) SC-10 SC-12 SC-12(1) SC-12(6) SC-13 SC-15 SC-16(2) SC-16(3) SC-18(1) SC-18(2) SC-18(3) SC-18(4) SC-2 SC-2(2) SC-20 SC-21 SC-22 SC-23 SC-23(1) SC-23(3) SC-23(5) SC-24 SC-28 SC-28(1) SC-28(11) SC-28(3) SC-3 SC-38 SC-39 SC-4 SC-45 SC-45(1) SC-45(1) SC-45(2) SC-49 SC-5 SC-5(1) SC-5(2) SC-5(3) SC-50 SC-51 SC-7 SC-7(10) SC-7(11) SC-7(12) SC-7(13) SC-7(14) SC-7(18) SC-7(21) SC-7(25) SC-7(29) SC-7(3) SC-7(4) SC-7(5) SC-7(5) SC-7(7) SC-7(8) SC-7(9) SC-8 SC-8(1) SC-8(2) SC-8(5) SI-10 SI-10(3) SI-10(6) SI-11 SI-14(3) SI-16 SI-19(4) SI-2 SI-2(2) SI-2(3) SI-2(6) SI-21 SI-3 SI-3 SI-3(10) SI-4 SI-4(1) SI-4(10) SI-4(11) SI-4(12) SI-4(13) SI-4(14) SI-4(15) SI-4(16) SI-4(17) SI-4(2) SI-4(20) SI-4(22) SI-4(23) SI-4(24) SI-4(25) SI-4(4) SI-4(5) SI-5 SI-5(1) SI-6 SI-7 SI-7(1) SI-7(17) SI-7(2) SI-7(5) SI-7(7) SI-7(8) SR-1 SR-1 SR-10 SR-11 SR-11 SR-11(1) SR-11(2) SR-11(3) SR-12 SR-2 SR-2(1) SR-3 SR-3(1) SR-3(2) SR-3(2) SR-3(3) SR-4 SR-4(1) SR-4(2) SR-4(3) SR-4(4) SR-5 SR-5 SR-5(1) SR-5(2) SR-6 SR-6(1) SR-6(1) SR-7 SR-7 SR-8 SR-9 SR-9(1) Nearly all D3FEND Techniques apply to Ground 5.2 5.3 7.5.1 7.5.2 7.5.3 A.5.1 A.5.2 A.5.4 A.5.15 A.5.31 A.5.36 A.5.37 A.5.16 A.5.18 A.8.2 A.8.16 A.5.15 A.5.33 A.8.3 A.8.4 A.8.18 A.8.20 A.8.2 A.8.4 A.5.14 A.8.22 A.8.23 A.8.11 A.8.10 A.5.15 A.8.2 A.8.18 A.8.5 A.8.5 A.7.7 A.8.1 A.5.14 A.6.7 A.8.1 A.8.16 A.5.14 A.8.1 A.8.20 A.5.14 A.7.9 A.8.1 A.5.14 A.7.9 A.8.20 A.6.3 A.8.15 A.8.15 A.8.6 A.5.25 A.6.8 A.8.15 A.7.4 A.8.17 A.5.33 A.8.15 A.5.28 A.8.15 A.8.15 A.8.15 A.5.14 A.8.21 9.1 9.3.2 9.3.3 A.5.36 9.2.2 A.8.9 A.8.9 8.1 9.3.3 A.8.9 A.8.32 A.8.9 A.8.9 A.8.9 A.8.9 A.8.19 A.8.19 A.5.9 A.8.9 A.5.2 A.8.9 A.8.19 7.5.1 7.5.2 7.5.3 A.5.2 A.5.29 A.8.1 A.8.6 A.5.30 A.5.29 A.7.11 A.5.29 A.5.33 A.8.13 A.5.29 A.5.16 A.5.16 A.5.16 A.5.17 A.8.5 A.5.16 A.6.3 A.5.25 A.5.26 A.5.27 A.8.16 A.5.5 A.6.8 A.7.10 A.7.13 A.8.10 A.8.10 A.8.16 A.8.10 A.7.13 A.5.10 A.7.7 A.7.10 A.5.13 A.5.10 A.7.7 A.7.10 A.8.10 A.5.10 A.7.9 A.7.10 A.5.10 A.7.10 A.7.14 A.8.10 A.5.10 A.7.10 A.5.8 A.5.7 4.4 6.2 7.5.1 7.5.2 7.5.3 10.2 4.4 6.2 7.4 7.5.1 7.5.2 7.5.3 9.1 9.2.2 10.1 10.2 A.8.8 6.1.3 8.3 10.2 A.5.22 A.5.7 A.5.2 A.5.8 A.8.25 A.8.31 A.8.33 8.1 A.5.8 A.5.20 A.5.23 A.8.29 A.8.30 A.8.28 7.5.1 7.5.2 7.5.3 A.5.37 A.8.27 A.8.28 A.5.2 A.5.4 A.5.8 A.5.14 A.5.22 A.5.23 A.8.21 A.8.9 A.8.28 A.8.30 A.8.32 A.8.29 A.8.30 A.5.8 A.8.25 A.8.25 A.8.27 A.8.6 A.5.14 A.8.16 A.8.20 A.8.22 A.8.23 A.8.26 A.8.23 A.8.12 A.5.10 A.5.14 A.8.20 A.8.26 A.5.33 A.8.20 A.8.24 A.8.24 A.8.26 A.5.31 A.5.14 A.5.10 A.5.33 A.6.8 A.8.8 A.8.32 A.8.7 A.8.16 A.8.16 A.8.16 A.8.16 A.5.6 A.8.11 A.8.10 5.2 5.3 7.5.1 7.5.2 7.5.3 A.5.1 A.5.2 A.5.4 A.5.19 A.5.31 A.5.36 A.5.37 A.5.19 A.5.20 A.5.21 A.8.30 A.5.20 A.5.21 A.5.21 A.8.30 A.5.20 A.5.21 A.5.23 A.8.29 A.5.22 A.5.22
CM0034 Monitor Critical Telemetry Points Monitor defined telemetry points for malicious activities (i.e., jamming attempts, commanding attempts (e.g., command modes, counters, etc.)). This would include valid/processed commands as well as commands that were rejected. Telemetry monitoring should synchronize with ground-based Defensive Cyber Operations (i.e., SIEM/auditing) to create a full space system situation awareness from a cybersecurity perspective. AC-17(1) AU-3(1) CA-7(6) IR-4(14) PL-8 PL-8(1) SA-8(13) SC-16 SC-7 SI-3(8) D3-NTA D3-PM D3-PMAD D3-RTSD A.8.16 A.5.8 A.5.14 A.8.16 A.8.20 A.8.22 A.8.23 A.8.26
CM0070 Alternate Communications Paths Establish alternate communications paths to reduce the risk of all communications paths being affected by the same incident. AC-17 CP-2 CP-8(3) PL-8 PL-8(1) SC-47 D3-NM D3-NTPM A.5.14 A.6.7 A.8.1 7.5.1 7.5.2 7.5.3 A.5.2 A.5.29 A.8.1 A.5.8
CM0032 On-board Intrusion Detection & Prevention Utilize on-board intrusion detection/prevention system that monitors the mission critical components or systems and audit/logs actions. The IDS/IPS should have the capability to respond to threats (initial access, execution, persistence, evasion, exfiltration, etc.) and it should address signature-based attacks along with dynamic never-before seen attacks using machine learning/adaptive technologies. The IDS/IPS must integrate with traditional fault management to provide a wholistic approach to faults on-board the spacecraft. Spacecraft should select and execute safe countermeasures against cyber-attacks.  These countermeasures are a ready supply of options to triage against the specific types of attack and mission priorities. Minimally, the response should ensure vehicle safety and continued operations. Ideally, the goal is to trap the threat, convince the threat that it is successful, and trace and track the attacker — with or without ground support. This would support successful attribution and evolving countermeasures to mitigate the threat in the future. “Safe countermeasures” are those that are compatible with the system’s fault management system to avoid unintended effects or fratricide on the system. AU-14 AU-2 AU-3 AU-3(1) AU-4 AU-4(1) AU-5 AU-5(2) AU-5(5) AU-6(1) AU-6(4) AU-8 AU-9 AU-9(2) AU-9(3) CA-7(6) CM-11(3) CP-10 CP-10(4) IR-4 IR-4(11) IR-4(12) IR-4(14) IR-4(5) IR-5 IR-5(1) PL-8 PL-8(1) RA-10 RA-3(4) SA-8(21) SA-8(22) SA-8(23) SC-16(2) SC-32(1) SC-5 SC-5(3) SC-7(10) SC-7(9) SI-10(6) SI-16 SI-17 SI-3 SI-3(8) SI-4 SI-4(1) SI-4(10) SI-4(11) SI-4(13) SI-4(16) SI-4(17) SI-4(2) SI-4(23) SI-4(24) SI-4(25) SI-4(4) SI-4(5) SI-6 SI-7(17) SI-7(8) D3-FA D3-DA D3-FCR D3-FH D3-ID D3-IRA D3-HD D3-IAA D3-FHRA D3-NTA D3-PMAD D3-RTSD D3-ANAA D3-CA D3-CSPP D3-ISVA D3-PM D3-SDM D3-SFA D3-SFV D3-SICA D3-USICA D3-FBA D3-FEMC D3-FV D3-OSM D3-PFV D3-EHB D3-IDA D3-MBT D3-SBV D3-PA D3-PSMD D3-PSA D3-SEA D3-SSC D3-SCA D3-FAPA D3-IBCA D3-PCSV D3-FCA D3-PLA D3-UBA D3-RAPA D3-SDA D3-UDTA D3-UGLPA D3-ANET D3-AZET D3-JFAPA D3-LAM D3-NI D3-RRID D3-NTF D3-ITF D3-OTF D3-EI D3-EAL D3-EDL D3-HBPI D3-IOPR D3-KBPI D3-MAC D3-SCF A.8.15 A.8.15 A.8.6 A.8.17 A.5.33 A.8.15 A.8.15 A.5.29 A.5.25 A.5.26 A.5.27 A.5.8 A.5.7 A.8.12 A.8.7 A.8.16 A.8.16 A.8.16 A.8.16
CM0042 Robust Fault Management Ensure fault management system cannot be used against the spacecraft. Examples include: safe mode with crypto bypass, orbit correction maneuvers, affecting integrity of telemetry to cause action from ground, or some sort of proximity operation to cause spacecraft to go into safe mode. Understanding the safing procedures and ensuring they do not put the spacecraft in a more vulnerable state is key to building a resilient spacecraft. CP-2 CP-4(5) PL-8 PL-8(1) SA-3 SA-4(5) SA-8 SA-8(13) SA-8(24) SA-8(3) SA-8(4) SC-16(2) SC-24 SC-5 SI-13 SI-17 D3-AH D3-EHPV D3-PSEP D3-PH D3-SCP 7.5.1 7.5.2 7.5.3 A.5.2 A.5.29 A.8.1 A.5.8 A.5.2 A.5.8 A.8.25 A.8.31 A.8.27 A.8.28
CM0044 Cyber-safe Mode Provide the capability to enter the spacecraft into a configuration-controlled and integrity-protected state representing a known, operational cyber-safe state (e.g., cyber-safe mode). Spacecraft should enter a cyber-safe mode when conditions that threaten the platform are detected.   Cyber-safe mode is an operating mode of a spacecraft during which all nonessential systems are shut down and the spacecraft is placed in a known good state using validated software and configuration settings. Within cyber-safe mode, authentication and encryption should still be enabled. The spacecraft should be capable of reconstituting firmware and software functions to pre-attack levels to allow for the recovery of functional capabilities. This can be performed by self-healing, or the healing can be aided from the ground. However, the spacecraft needs to have the capability to replan, based on equipment still available after a cyber-attack. The goal is for the spacecraft to resume full mission operations. If not possible, a reduced level of mission capability should be achieved. Cyber-safe mode software/configuration should be stored onboard the spacecraft in memory with hardware-based controls and should not be modifiable.                                                  CP-10 CP-10(4) CP-12 CP-2 CP-2(5) IR-4 IR-4(12) IR-4(3) PL-8 PL-8(1) SA-3 SA-8 SA-8(10) SA-8(12) SA-8(13) SA-8(21) SA-8(23) SA-8(24) SA-8(3) SA-8(4) SC-16(2) SC-24 SC-5 SI-11 SI-17 SI-7(17) D3-PH D3-EI D3-NI D3-BA 7.5.1 7.5.2 7.5.3 A.5.2 A.5.29 A.8.1 A.5.29 A.5.25 A.5.26 A.5.27 A.5.8 A.5.2 A.5.8 A.8.25 A.8.31 A.8.27 A.8.28
CM0029 TRANSEC Utilize TRANSEC in order to prevent interception, disruption of reception, communications deception, and/or derivation of intelligence by analysis of transmission characteristics such as signal parameters or message externals. For example, jam-resistant waveforms can be utilized to improve the resistance of radio frequency signals to jamming and spoofing. Note: TRANSEC is that field of COMSEC which deals with the security of communication transmissions, rather than that of the information being communicated. AC-17 AC-18 AC-18(5) CA-3 CP-8 PL-8 PL-8(1) SC-16 SC-40 SC-40(1) SC-40(3) SC-40(4) SC-5 SC-8(1) SC-8(3) SC-8(4) D3-MH D3-MAN D3-MENCR D3-NTA D3-DNSTA D3-ISVA D3-NTCD D3-RTA D3-PMAD D3-FC D3-CSPP D3-ANAA D3-RPA D3-IPCTA D3-NTCD D3-NTPM D3-TAAN A.5.14 A.6.7 A.8.1 A.5.14 A.8.1 A.8.20 A.5.14 A.8.21 A.5.29 A.7.11 A.5.8 A.5.33

References