Full Report
2025-02-02 • Team82 • Team82 • elf.cms8000_backdoor Open article on Malpedia
Analysis Summary
The provided text describes research findings related to malware found on certain medical devices, specifically mentioning a "CMS8000 backdoor" and linking to an article discussing Contec CMS8000 patient monitors. **Crucially, the provided text does not contain any specific CVE identifiers, CVSS scores, detailed technical vulnerability descriptions (like buffer overflows or injection flaws), or explicit patch information.**
Therefore, the summary below reflects the *context* provided (a known malware presence on medical devices) but must use placeholders or state "Not Available" for the required security-specific metrics that were missing from the input.
# Vulnerability: Potential Backdoor Pre-Installation on Contec CMS8000 Patient Monitors
## CVE Details
- CVE ID: Not Available in source text
- CVSS Score: Not Available in source text
- CWE: Not Available in source text (Likely related to insecure deployment/supply chain)
## Affected Systems
- Products: Contec CMS8000 Patient Monitors (Implied by external article link)
- Versions: Not Specifically Listed
- Configurations: Devices infected with the `elf.cms8000_backdoor` (Pre-existing condition)
## Vulnerability Description
The primary finding is the presence of malware identified as `elf.cms8000_backdoor` potentially present on Contec CMS8000 series patient monitoring systems. This suggests a supply chain compromise or pre-installation of malicious software, providing unauthorized remote access capabilities to the devices. The specific technical root cause (e.g., which software component contained the flaw leading to infection) is not detailed here.
## Exploitation
- Status: Implied persistence/backdoor presence rather than active exploitation tracking. (Status: Established Compromise)
- Complexity: Likely Low for initial external researchers gaining access to the backdoor structure.
- Attack Vector: Unknown for initial compromise, but the backdoor enables persistent network access.
## Impact
- Confidentiality: High (Potential exfiltration of sensitive patient data)
- Integrity: High (Potential for unauthorized modification of monitoring parameters)
- Availability: Medium to High (Potential for device disruption or denial of service)
## Remediation
### Patches
- Patches specifically addressing the backdoor installation or underlying flaw: Not Available in source text.
### Workarounds
- Network isolation/Segmentation of affected medical devices.
- Replacement or secure reimaging of infected monitors (if possible).
## Detection
- Indicators of Compromise: Presence of the `elf.cms8000_backdoor` binary file on the device file system.
- Detection methods and tools: Network traffic analysis looking for C2 beaconing from the affected devices; Endpoint detection and response (EDR) tools configured for binary analysis on embedded OSes.
## References
- Vendor Advisories: Not Available in source text
- Relevant links - defanged:
- malpedia.caad.fkie.fraunhofer.de/details/elf.cms8000_backdoor
- claroty.com/team82/research/are-contec-cms8000-patient-monitors-infected-with-a-chinese-backdoor-the-reality-is-more-complicated