Why isolate backup credentials from Active Directory?

Ransomware often spreads via compromised AD credentials. Keeping backup accounts separate prevents attackers from using domain admin rights to delete or encrypt your backups.

What is the 3-2-1-1-0 backup methodology?

It is an extension of the traditional backup rule: 3 copies of data, on 2 different media types, 1 offsite, 1 immutable or air-gapped copy, and 0 errors during restore verification.

Does this skill support specific cloud providers?

Yes, it provides configuration patterns for AWS S3 Object Lock, Azure Immutable Blob Storage, and Linux-based Hardened Repositories for Veeam.

How does this help with RPO and RTO?

It helps categorize assets into tiers (Tier 1/2/3) to ensure critical systems have the most frequent backups and fastest recovery paths to meet business continuity goals.

Can this skill help automate backup verification?

Yes, it includes workflows for implementing automated restore testing to ensure backups are verified and functional before an actual disaster occurs.

Ransomware-Resilient Backup Strategy

Name: Ransomware-Resilient Backup Strategy
Author: mukul975

bymukul975

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4,121

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Security & Testing

Implements secure backup architectures using the 3-2-1-1-0 methodology to protect critical data against ransomware encryption and deletion attempts.

This skill provides comprehensive guidance for designing and deploying ransomware-resistant backup infrastructures. It automates the configuration of the 3-2-1-1-0 backup rule—incorporating immutable storage and air-gapped copies—while establishing strict credential isolation from production domains. By aligning backup schedules with RPO/RTO requirements and implementing automated restore testing via tools like Veeam SureBackup or cloud-native object locks, it ensures that organizations can reliably recover from sophisticated cyberattacks without being forced to pay ransoms.

Key Features

01Isolates backup credentials from Active Directory to prevent lateral movement

024,121 GitHub stars

03Implements the 3-2-1-1-0 backup methodology for maximum data resilience

04Configures immutable storage and air-gapped repositories like AWS S3 Object Lock

05Establishes RPO/RTO-aligned schedules and automated recovery verification

06Provides detailed gap analysis for existing backup architectures

Use Cases

01Meeting cyber insurance requirements for immutable and tested recovery capabilities

02Migrating legacy backups to modern cloud-native or hardened on-premises repositories

03Hardening existing backup infrastructure against advanced ransomware threats

What are Skills?·How to Install

Install with 🐟 Skill.Fish

npx skillfish add mukul975/anthropic-cybersecurity-skills implementing-ransomware-backup-strategy

For use in Claude.ai and ChatGPT

Key Features

01Isolates backup credentials from Active Directory to prevent lateral movement

024,121 GitHub stars

03Implements the 3-2-1-1-0 backup methodology for maximum data resilience

04Configures immutable storage and air-gapped repositories like AWS S3 Object Lock

05Establishes RPO/RTO-aligned schedules and automated recovery verification

06Provides detailed gap analysis for existing backup architectures

Use Cases

01Meeting cyber insurance requirements for immutable and tested recovery capabilities

02Migrating legacy backups to modern cloud-native or hardened on-premises repositories

03Hardening existing backup infrastructure against advanced ransomware threats

What are Skills?·How to Install

Install with 🐟 Skill.Fish

npx skillfish add mukul975/anthropic-cybersecurity-skills implementing-ransomware-backup-strategy

For use in Claude.ai and ChatGPT