Implements immutable backup strategy using restic with S3-compatible storage and object lock for ransomware-resistant data protection. Automates backup creation, integrity verification via restic check --read-data, snapshot retention policy enforcement, and restore testing. Integrates with AWS S3 Object Lock, MinIO, and Backblaze B2 for WORM (Write Once Read Many) storage that prevents backup deletion or encryption by ransomware actors.
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Before installing skills in Cursor, ensure your development environment meets these requirements:
node --versionimplementing-immutable-backup-with-resticExecute the skills CLI command in your project's root directory to begin installation:
Fetches implementing-immutable-backup-with-restic from mukul975/Anthropic-Cybersecurity-Skills and configures it for Cursor.
The CLI shows a list of agents. Use arrow keys and space to select Cursor:
Confirm successful installation by checking the skill directory location:
Restart Cursor to activate implementing-immutable-backup-with-restic. Access via /implementing-immutable-backup-with-restic in your agent's command palette.
We perform automated surface-level scans (Gen AI Scanner, Socket, Snyk) during installation. These checks detect common vulnerabilities but do not guarantee complete security. Always review skill source code and verify the publisher's reputation before production use.
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| name | implementing-immutable-backup-with-restic |
| description | 'Implements immutable backup strategy using restic with S3-compatible storage and object lock for ransomware-resistant data protection. Automates backup creation, integrity verification via restic check --read-data, snapshot retention policy enforcement, and restore testing. Integrates with AWS S3 Object Lock, MinIO, and Backblaze B2 for WORM (Write Once Read Many) storage that prevents backup deletion or encryption by ransomware actors. ' |
| domain | cybersecurity |
| subdomain | ransomware-defense |
| tags | - restic - backup - immutable - ransomware - s3 - object-lock - worm - recovery |
| version | 1.0.0 |
| author | mahipal |
| license | Apache-2.0 |
| nist_ai_rmf | - MEASURE-2.7 - MAP-5.1 - MANAGE-2.4 |
| atlas_techniques | - AML.T0070 - AML.T0066 - AML.T0082 |
| nist_csf | - PR.DS-11 - RS.MA-01 - RC.RP-01 - PR.IR-01 |
Do not use as the sole backup solution without also maintaining offline/air-gapped copies. Object lock protects against logical deletion but not physical storage failure.
Create an encrypted restic repository on S3-compatible storage with object lock enabled. Restic uses AES-256-CTR for encryption with Poly1305-AES for authentication, ensuring backup data is both confidential and tamper-evident.
Enable S3 Object Lock in Compliance mode on the backup bucket to prevent any principal (including root) from deleting or modifying objects during the retention period. Set retention to match your backup window requirements (typically 30-90 days).
Schedule backup operations with post-backup integrity verification using restic check --read-data which downloads and verifies every data blob against its stored checksum. Log results and alert on any integrity failures.
Periodically restore random files from backup snapshots to a temporary location and compare checksums against the original to validate end-to-end backup integrity. Document restore times for RTO planning.
| Term | Definition |
|---|---|
| Object Lock | S3 feature that prevents object deletion or overwrite for a specified retention period |
| Compliance Mode | Object Lock mode where even the root account cannot delete objects before retention expires |
| Deduplication | Restic stores data in content-addressable chunks, deduplicating across all snapshots |
| 3-2-1-1-0 | 3 copies, 2 media types, 1 offsite, 1 immutable, 0 errors in verification |
BACKUP VERIFICATION REPORT
===========================
Repository: s3:s3.amazonaws.com/company-backups-immutable
Snapshots: 45
Total Size: 2.3 TiB (deduplicated from 8.7 TiB)
Last Backup: 2026-03-11T02:00:00Z
Integrity Check: PASSED (all packs verified)
Object Lock: Compliance mode, 90-day retention
Restore Test: PASSED (15 files verified)
Prerequisites
Time Estimate
15-45 minutes depending on use case complexity
Steps
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Use when skill capabilities match your task, clear ROI on time saved, and you can validate outputs. Best for repetitive tasks, learning, and quality improvement.
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Avoid when task requires deep expertise you can't validate, involves sensitive decisions, or when learning process is more valuable than speed of completion.
mukul975/Anthropic-Cybersecurity-Skills
mukul975/Anthropic-Cybersecurity-Skills
mukul975/Anthropic-Cybersecurity-Skills
mukul975/Anthropic-Cybersecurity-Skills
mukul975/Anthropic-Cybersecurity-Skills
mukul975/Anthropic-Cybersecurity-Skills
I recommend implementing-immutable-backup-with-restic for anyone iterating fast on agent tooling; clear intent and a small, reviewable surface area.
Solid pick for teams standardizing on skills: implementing-immutable-backup-with-restic is focused, and the summary matches what you get after install.
Solid pick for teams standardizing on skills: implementing-immutable-backup-with-restic is focused, and the summary matches what you get after install.
Keeps context tight: implementing-immutable-backup-with-restic is the kind of skill you can hand to a new teammate without a long onboarding doc.
Registry listing for implementing-immutable-backup-with-restic matched our evaluation — installs cleanly and behaves as described in the markdown.
implementing-immutable-backup-with-restic reduced setup friction for our internal harness; good balance of opinion and flexibility.
We added implementing-immutable-backup-with-restic from the explainx registry; install was straightforward and the SKILL.md answered most questions upfront.
We added implementing-immutable-backup-with-restic from the explainx registry; install was straightforward and the SKILL.md answered most questions upfront.
Useful defaults in implementing-immutable-backup-with-restic — fewer surprises than typical one-off scripts, and it plays nicely with `npx skills` flows.
I recommend implementing-immutable-backup-with-restic for anyone iterating fast on agent tooling; clear intent and a small, reviewable surface area.
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