[{"data":1,"prerenderedAt":-1},["ShallowReactive",2],{"skill:01M6ETVGD0VZCEPW2H285FEW3T":3,"skill-same:01M6ETVGD0VZCEPW2H285FEW3T":99},{"skillNo":4,"name":5,"nameZh":6,"description":7,"descriptionZh":6,"repositoryFullName":8,"ownerLogin":9,"ownerAvatarUrl":10,"ownerAccountNo":11,"ownerDisplayName":12,"repositoryNo":13,"starsCount":14,"licenseSpdxId":15,"licenseFileUrl":6,"sourceHtmlUrl":16,"categories":17,"keywords":18,"publishedAt":39,"linkOnly":40,"markdownContent":41,"markdownBody":42,"frontMatter":43,"refName":60,"commitSha":61,"skillDirectory":62,"forksCount":14,"repositoryHtmlUrl":63,"repositoryHomepageUrl":64,"ownerHtmlUrl":65,"ownerBlogUrl":6,"ownerDescription":66,"updatedAt":67,"install":68,"resources":81},"01M6ETVGD0VZCEPW2H285FEW3T","hunting-for-dns-based-persistence",null,"Hunt for DNS-based persistence mechanisms including DNS hijacking, dangling CNAME records, wildcard DNS abuse, and unauthorized zone modifications using passive DNS databases, SecurityTrails API, and DNS audit log analysis.","henriquescastilho\u002Fmy-claude","henriquescastilho","https:\u002F\u002Favatars.githubusercontent.com\u002Fu\u002F153296945?v=4","01M6ESH7EXPXTH9CVQ4K16SRG8","Henrique Scheer","01M6ESH7JHEK2PTNNH4HEH787Z",0,"Apache-2.0","https:\u002F\u002Fgithub.com\u002Fhenriquescastilho\u002Fmy-claude\u002Fblob\u002Fmain\u002F.claude\u002Fskills\u002Fhunting-for-dns-based-persistence\u002FSKILL.md",[],[19,20,21,22,23,24,25,26,27,28,29,30,31,32,33,34,35,36,37,38],"persistence","dns","hunting for dns based persistence","takeover","records","de","id","hunt","log","databases","cm","subdomain","log analysis","cybersecurity","api","analysis","securitytrails","dns-hijacking","subdomain-takeover","audit","2026-11-10 10:12:30",false,"---\nname: hunting-for-dns-based-persistence\ndescription: Hunt for DNS-based persistence mechanisms including DNS hijacking, dangling\n  CNAME records, wildcard DNS abuse, and unauthorized zone modifications using passive\n  DNS databases, SecurityTrails API, and DNS audit log analysis.\ndomain: cybersecurity\nsubdomain: threat-hunting\ntags:\n- dns\n- persistence\n- threat-hunting\n- passive-dns\n- dns-hijacking\n- subdomain-takeover\n- securitytrails\nversion: '1.0'\nauthor: mahipal\nlicense: Apache-2.0\nnist_csf:\n- DE.CM-01\n- DE.AE-02\n- DE.AE-07\n- ID.RA-05\nmitre_attack:\n- T1046\n- T1057\n- T1082\n- T1083\n- T1547\n---\n\n# Hunting for DNS-based Persistence\n\n## Overview\n\nAttackers establish DNS-based persistence by hijacking DNS records, creating unauthorized subdomains, abusing wildcard DNS entries, or modifying NS delegations to redirect traffic through attacker-controlled infrastructure. These techniques survive credential rotations, endpoint reimaging, and traditional remediation because DNS changes persist independently of compromised hosts. Detection requires passive DNS historical analysis, zone file auditing, and monitoring for unauthorized record modifications. This skill covers hunting methodologies using SecurityTrails passive DNS API, DNS audit logs from Route53\u002FAzure DNS\u002FCloudflare, and zone transfer analysis.\n\n\n## When to Use\n\n- When investigating security incidents that require hunting for dns based persistence\n- When building detection rules or threat hunting queries for this domain\n- When SOC analysts need structured procedures for this analysis type\n- When validating security monitoring coverage for related attack techniques\n\n## Prerequisites\n\n- SecurityTrails API key (free tier provides 50 queries\u002Fmonth)\n- Access to DNS provider audit logs (Route53, Azure DNS, Cloudflare, or on-premises DNS)\n- Python 3.9+ with requests library\n- DNS zone file access or AXFR capability for internal zones\n- Historical DNS baseline for comparison\n\n## Steps\n\n### Step 1: Baseline DNS Records\n\nExport current DNS zone records and establish baseline for all authorized A, AAAA, CNAME, MX, NS, and TXT records.\n\n### Step 2: Query Passive DNS History\n\nUse SecurityTrails API to retrieve historical DNS records and identify unauthorized changes, new subdomains, and CNAME records pointing to decommissioned services (dangling CNAMEs).\n\n### Step 3: Detect Anomalies\n\nCompare current records against baseline to identify unauthorized modifications, wildcard records that resolve all subdomains, NS delegation changes, and MX record hijacking.\n\n### Step 4: Investigate Findings\n\nCorrelate DNS anomalies with threat intelligence feeds, check resolution targets against known malicious infrastructure, and validate record ownership.\n\n## Expected Output\n\nJSON report listing DNS anomalies with record type, historical changes, risk severity, and remediation recommendations for each finding.\n","# Hunting for DNS-based Persistence\n\n## Overview\n\nAttackers establish DNS-based persistence by hijacking DNS records, creating unauthorized subdomains, abusing wildcard DNS entries, or modifying NS delegations to redirect traffic through attacker-controlled infrastructure. These techniques survive credential rotations, endpoint reimaging, and traditional remediation because DNS changes persist independently of compromised hosts. Detection requires passive DNS historical analysis, zone file auditing, and monitoring for unauthorized record modifications. This skill covers hunting methodologies using SecurityTrails passive DNS API, DNS audit logs from Route53\u002FAzure DNS\u002FCloudflare, and zone transfer analysis.\n\n\n## When to Use\n\n- When investigating security incidents that require hunting for dns based persistence\n- When building detection rules or threat hunting queries for this domain\n- When SOC analysts need structured procedures for this analysis type\n- When validating security monitoring coverage for related attack techniques\n\n## Prerequisites\n\n- SecurityTrails API key (free tier provides 50 queries\u002Fmonth)\n- Access to DNS provider audit logs (Route53, Azure DNS, Cloudflare, or on-premises DNS)\n- Python 3.9+ with requests library\n- DNS zone file access or AXFR capability for internal zones\n- Historical DNS baseline for comparison\n\n## Steps\n\n### Step 1: Baseline DNS Records\n\nExport current DNS zone records and establish baseline for all authorized A, AAAA, CNAME, MX, NS, and TXT records.\n\n### Step 2: Query Passive DNS History\n\nUse SecurityTrails API to retrieve historical DNS records and identify unauthorized changes, new subdomains, and CNAME records pointing to decommissioned services (dangling CNAMEs).\n\n### Step 3: Detect Anomalies\n\nCompare current records against baseline to identify unauthorized modifications, wildcard records that resolve all subdomains, NS delegation changes, and MX record hijacking.\n\n### Step 4: Investigate Findings\n\nCorrelate DNS anomalies with threat intelligence feeds, check resolution targets against known malicious infrastructure, and validate record ownership.\n\n## Expected Output\n\nJSON report listing DNS anomalies with record type, historical changes, risk severity, and remediation recommendations for each finding.\n",{"name":5,"tags":44,"author":47,"domain":32,"license":15,"version":48,"nist_csf":49,"subdomain":45,"description":7,"mitre_attack":54},[20,19,45,46,36,37,35],"threat-hunting","passive-dns","mahipal","1.0",[50,51,52,53],"DE.CM-01","DE.AE-02","DE.AE-07","ID.RA-05",[55,56,57,58,59],"T1046","T1057","T1082","T1083","T1547","main","7925716f065257435fdb12e97f7e52842147d5ad",".claude\u002Fskills\u002Fhunting-for-dns-based-persistence","https:\u002F\u002Fgithub.com\u002Fhenriquescastilho\u002Fmy-claude","https:\u002F\u002Fclaude.com\u002Fclaude-code","https:\u002F\u002Fgithub.com\u002Fhenriquescastilho","Software · Applied AI · Quantitative Modeling · Building with Claude.","2026-06-10 12:24:46",{"source":8,"skillName":5,"commands":69,"prompt":79,"zipAvailable":80},[70,73,76],{"tool":71,"command":72},"npx","npx skills add henriquescastilho\u002Fmy-claude --skill hunting-for-dns-based-persistence",{"tool":74,"command":75},"bunx","bunx skills add henriquescastilho\u002Fmy-claude --skill hunting-for-dns-based-persistence",{"tool":77,"command":78},"pnpm","pnpm dlx skills add henriquescastilho\u002Fmy-claude --skill hunting-for-dns-based-persistence","安装技能，技能地址：https:\u002F\u002Fgithub.com\u002Fhenriquescastilho\u002Fmy-claude\u002Fblob\u002Fmain\u002F.claude\u002Fskills\u002Fhunting-for-dns-based-persistence\u002FSKILL.md",true,[82,87,93],{"path":83,"resourceType":83,"resourceTypeDesc":84,"sizeBytes":85,"sourceHtmlUrl":86},"LICENSE","许可证",11255,"https:\u002F\u002Fgithub.com\u002Fhenriquescastilho\u002Fmy-claude\u002Fblob\u002Fmain\u002F.claude\u002Fskills\u002Fhunting-for-dns-based-persistence\u002FLICENSE",{"path":88,"resourceType":89,"resourceTypeDesc":90,"sizeBytes":91,"sourceHtmlUrl":92},"references\u002Fapi-reference.md","REFERENCE","参考文档",2657,"https:\u002F\u002Fgithub.com\u002Fhenriquescastilho\u002Fmy-claude\u002Fblob\u002Fmain\u002F.claude\u002Fskills\u002Fhunting-for-dns-based-persistence\u002Freferences\u002Fapi-reference.md",{"path":94,"resourceType":95,"resourceTypeDesc":96,"sizeBytes":97,"sourceHtmlUrl":98},"scripts\u002Fagent.py","SCRIPT","脚本",6759,"https:\u002F\u002Fgithub.com\u002Fhenriquescastilho\u002Fmy-claude\u002Fblob\u002Fmain\u002F.claude\u002Fskills\u002Fhunting-for-dns-based-persistence\u002Fscripts\u002Fagent.py",[100,143,152,161,183,210],{"skillNo":101,"name":102,"nameZh":6,"description":103,"descriptionZh":6,"repositoryFullName":8,"ownerLogin":9,"ownerAvatarUrl":10,"ownerAccountNo":11,"ownerDisplayName":12,"repositoryNo":13,"starsCount":14,"licenseSpdxId":104,"licenseFileUrl":6,"sourceHtmlUrl":105,"categories":106,"keywords":123,"publishedAt":39},"01M6F0B6XPQ65AX2X0DWK8KT3E","markitdown","Convert files and office documents to Markdown. 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