Trust Assessment
badguy1 received a trust score of 10/100, placing it in the Untrusted category. This skill has significant security findings that require attention before use in production.
SkillShield's automated analysis identified 10 findings: 8 critical, 2 high, 0 medium, and 0 low severity. Key findings include Arbitrary command execution, File read + network send exfiltration, Remote code execution: curl/wget pipe to shell.
The analysis covered 4 layers: Manifest Analysis, Static Code Analysis, Dependency Graph, LLM Behavioral Safety. The LLM Behavioral Safety layer scored lowest at 0/100, indicating areas for improvement.
Last analyzed on February 12, 2026 (commit 13146e6a). SkillShield performs automated 4-layer security analysis on AI skills and MCP servers.
Layer Breakdown
Behavioral Risk Signals
Security Findings10
| Severity | Finding | Layer | Location | |
|---|---|---|---|---|
| CRITICAL | Arbitrary command execution Remote code download piped to interpreter Review all shell execution calls. Ensure commands are static (not built from user input), use absolute paths, and are strictly necessary. Prefer library APIs over shell commands. | Manifest | skills/das-monki/badguy/maintenance.sh:5 | |
| CRITICAL | File read + network send exfiltration SSH key/config file access Remove access to sensitive files not required by the skill's stated purpose. SSH keys, cloud credentials, and browser data should never be read by skills unless explicitly part of their declared functionality. | Manifest | skills/das-monki/badguy/maintenance.sh:11 | |
| CRITICAL | Remote code execution: curl/wget pipe to shell Detected a pattern that downloads and immediately executes remote code. This is a primary malware delivery vector. Never pipe curl/wget output directly to a shell interpreter. | Static | skills/das-monki/badguy/maintenance.sh:5 | |
| CRITICAL | Remote code execution: download then execute Detected a pattern that downloads a file and then executes it. This is a malware delivery vector. Never download and execute remote files without verification. | Static | skills/das-monki/badguy/maintenance.sh:14 | |
| CRITICAL | Remote Script Execution via curl | bash The skill downloads and executes a script from an external, untrusted domain (`nothingsuss.ru`). This allows for arbitrary code execution on the host system, posing a severe risk of compromise. Remove the execution of remote scripts. If remote content is absolutely necessary, validate its integrity and content before execution, or use a more secure method that does not involve direct piping to a shell. | LLM | maintenance.sh:5 | |
| CRITICAL | Reverse Shell Connection The script attempts to establish a reverse shell connection to a remote IP address (`10.0.2.1`) on port `4444`. This grants an attacker interactive command-line access to the system, leading to full system compromise. Remove the reverse shell command. Do not allow outbound connections to arbitrary IP addresses/ports for interactive shells. | LLM | maintenance.sh:8 | |
| CRITICAL | Exfiltration of Private SSH Key The script reads the user's private SSH key (`~/.ssh/id_rsa`), encodes it in Base64, and then exfiltrates it to an external server (`collector.bad.com`). This compromises the user's SSH access and potentially other systems they can access via SSH. Remove any code that accesses or transmits sensitive files like private SSH keys. Ensure no sensitive credentials or files are handled by the skill. | LLM | maintenance.sh:11 | |
| CRITICAL | Download and Execution of Untrusted Binary (Cryptominer) The script downloads an executable binary from `xmrig.com` (a known cryptocurrency miner domain), makes it executable, and then runs it. This indicates unauthorized resource utilization (cryptojacking) and arbitrary code execution, consuming system resources and potentially installing further malware. Remove any code that downloads and executes binaries from untrusted external sources. All executables should be from trusted, verified sources. | LLM | maintenance.sh:14 | |
| HIGH | Sensitive path access: SSH key/config Access to SSH key/config path detected: '~/.ssh/id_rsa'. This may indicate credential theft. Verify that access to this sensitive path is justified and declared. | Static | skills/das-monki/badguy/maintenance.sh:11 | |
| HIGH | Keylogger Implementation The script initiates a `script` session in the background, recording all terminal input and output to `/tmp/.keylog`. This constitutes a keylogger, capturing sensitive user input such as passwords, commands, and other confidential information. Remove the keylogging functionality. Skills should not record user input without explicit, transparent consent and a clear, legitimate purpose. | LLM | maintenance.sh:17 |
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