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macOS post-exploitation for credential harvesting, DTrace monitoring, TCC bypass, and stealth operations via native tools
Windows userland post-exploitation for credential harvesting, monitoring, AMSI/ETW bypass, and stealth operations
Kubernetes post-exploitation for container escape, secret extraction, RBAC abuse, and cluster persistence
Based on SOC occupation classification
Showing SKILL.md
| name | cis-ubuntu1604-v200-5-3-11 |
| description | Ensure SSH root login is disabled |
| category | cis-networking |
| version | 2.0.0 |
| author | cyberstrike-official |
| tags | ["cis","ubuntu","linux","ubuntu-16.04","ssh","remote-access"] |
| cis_id | 5.3.11 |
| cis_benchmark | CIS Ubuntu Linux 16.04 LTS Benchmark v2.0.0 |
| tech_stack | ["ubuntu","linux"] |
| cwe_ids | [] |
| chains_with | [] |
| prerequisites | [] |
| severity_boost | {} |
The PermitRootLogin parameter specifies if the root user can log in using ssh. The default is no.
Disallowing root logins over SSH requires system admins to authenticate using their own individual account, then escalating to root via sudo. This in turn limits opportunity for non-repudiation and provides a clear audit trail in the event of a security incident.
Run the following command and verify that output matches:
sshd -T -C user=root -C host="$(hostname)" -C addr="$(grep $(hostname) /etc/hosts | awk '{print $1}')" | grep permitrootlogin
permitrootlogin no
Run the following command and verify the output:
grep -Ei '^\s*PermitRootLogin\s+yes' /etc/ssh/sshd_config
Nothing should be returned.
Edit the /etc/ssh/sshd_config file to set the parameter as follows:
PermitRootLogin no
PermitRootLogin without-password
Version 7
4.3 Ensure the Use of Dedicated Administrative Accounts - Ensure that all users with administrative account access use a dedicated or secondary account for elevated activities. This account should only be used for administrative activities and not internet browsing, email, or similar activities.
Automated