[{"data":1,"prerenderedAt":-1},["ShallowReactive",2],{"skill:01M6EVEZBEND47RF2JQZRC7E9W":3,"skill-same:01M6EVEZBEND47RF2JQZRC7E9W":87},{"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":48,"commitSha":49,"skillDirectory":50,"forksCount":51,"repositoryHtmlUrl":52,"repositoryHomepageUrl":6,"ownerHtmlUrl":53,"ownerBlogUrl":6,"ownerDescription":54,"updatedAt":55,"install":56,"resources":69},"01M6EVEZBEND47RF2JQZRC7E9W","hunting-for-domain-fronting-c2-traffic",null,"Detect domain fronting C2 traffic by analyzing SNI vs HTTP Host header mismatches in proxy logs and TLS certificate discrepancies using pyOpenSSL for certificate inspection","luokai0\u002Fai-agent-skills-by-luo-kai","luokai0","https:\u002F\u002Favatars.githubusercontent.com\u002Fu\u002F266954973?v=4","01M6E16VNT42JB8B3X3254QWJ7","luo kai","01M6E16VTFVP6S5XJF1V1MPV90",14,"Apache-2.0","https:\u002F\u002Fgithub.com\u002Fluokai0\u002Fai-agent-skills-by-luo-kai\u002Fblob\u002Fmain\u002Fai-agent-skills\u002F21-external-registries\u002F08-pinkpixel-collection\u002Fhunting-for-domain-fronting-c2-traffic\u002FSKILL.md",[],[19,20,21,22,23,24,25,26,27,28,29,30,31,32,33,34,35,36,37,38],"hunting","domain","c2","hunting for domain fronting c2 traffic","detection","detect","host","pyopenssl","tls-inspection","domain-fronting","proxy-logs","cybersecurity","tls","network-security","network","analyzing","threat-hunting","logs","proxy","http","2026-11-10 10:12:30",false,"---\nname: hunting-for-domain-fronting-c2-traffic\ndescription: Detect domain fronting C2 traffic by analyzing SNI vs HTTP Host header mismatches in proxy logs and TLS certificate discrepancies using pyOpenSSL for certificate inspection\ndomain: cybersecurity\nsubdomain: threat-hunting\ntags:\n  - domain-fronting\n  - c2-detection\n  - tls-inspection\n  - proxy-logs\n  - pyopenssl\n  - threat-hunting\n  - network-security\nversion: \"1.0\"\nauthor: mahipal\nlicense: Apache-2.0\n---\n\n# Hunting for Domain Fronting C2 Traffic\n\n## Overview\n\nDomain fronting (MITRE ATT&CK T1090.004) is a technique where attackers use different domain names in the TLS SNI field and the HTTP Host header to disguise C2 traffic behind legitimate CDN-hosted domains. This skill detects domain fronting by parsing proxy\u002Fweb gateway logs for SNI-Host header mismatches, analyzing TLS certificates for CDN provider identification, flagging connections where the SNI points to a high-reputation domain but the Host header targets an attacker-controlled domain, and correlating with known CDN provider IP ranges.\n\n\n## When to Use\n\n- When investigating security incidents that require hunting for domain fronting c2 traffic\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- Web proxy or secure web gateway logs with SNI and Host header fields\n- Python 3.8+ with pyOpenSSL and cryptography libraries\n- TLS inspection enabled on proxy for Host header visibility\n- CDN provider IP range lists (CloudFront, Azure CDN, Cloudflare)\n\n## Steps\n\n1. Parse proxy logs for connections with both SNI and Host header fields\n2. Compare SNI domain against HTTP Host header for mismatches\n3. Extract TLS certificate Subject and SAN fields using pyOpenSSL\n4. Identify CDN-hosted connections via certificate issuer and IP ranges\n5. Flag high-confidence domain fronting where SNI and Host differ on CDN IPs\n6. Score alerts based on domain reputation differential\n7. Generate detection report with network flow context\n\n## Expected Output\n\nJSON report containing detected domain fronting indicators with SNI-Host pairs, certificate details, CDN provider identification, confidence scores, and MITRE ATT&CK technique mapping.\n","# Hunting for Domain Fronting C2 Traffic\n\n## Overview\n\nDomain fronting (MITRE ATT&CK T1090.004) is a technique where attackers use different domain names in the TLS SNI field and the HTTP Host header to disguise C2 traffic behind legitimate CDN-hosted domains. This skill detects domain fronting by parsing proxy\u002Fweb gateway logs for SNI-Host header mismatches, analyzing TLS certificates for CDN provider identification, flagging connections where the SNI points to a high-reputation domain but the Host header targets an attacker-controlled domain, and correlating with known CDN provider IP ranges.\n\n\n## When to Use\n\n- When investigating security incidents that require hunting for domain fronting c2 traffic\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- Web proxy or secure web gateway logs with SNI and Host header fields\n- Python 3.8+ with pyOpenSSL and cryptography libraries\n- TLS inspection enabled on proxy for Host header visibility\n- CDN provider IP range lists (CloudFront, Azure CDN, Cloudflare)\n\n## Steps\n\n1. Parse proxy logs for connections with both SNI and Host header fields\n2. Compare SNI domain against HTTP Host header for mismatches\n3. Extract TLS certificate Subject and SAN fields using pyOpenSSL\n4. Identify CDN-hosted connections via certificate issuer and IP ranges\n5. Flag high-confidence domain fronting where SNI and Host differ on CDN IPs\n6. Score alerts based on domain reputation differential\n7. Generate detection report with network flow context\n\n## Expected Output\n\nJSON report containing detected domain fronting indicators with SNI-Host pairs, certificate details, CDN provider identification, confidence scores, and MITRE ATT&CK technique mapping.\n",{"name":5,"tags":44,"author":46,"domain":30,"license":15,"version":47,"subdomain":35,"description":7},[28,45,27,29,26,35,32],"c2-detection","mahipal","1.0","main","4d2fb89cdfb75f3f6fd3c6c5ec9ad90ea129eb3c","ai-agent-skills\u002F21-external-registries\u002F08-pinkpixel-collection\u002Fhunting-for-domain-fronting-c2-traffic",2,"https:\u002F\u002Fgithub.com\u002Fluokai0\u002Fai-agent-skills-by-luo-kai","https:\u002F\u002Fgithub.com\u002Fluokai0","a solo builder.","2026-05-06 04:29:04",{"source":8,"skillName":5,"commands":57,"prompt":67,"zipAvailable":68},[58,61,64],{"tool":59,"command":60},"npx","npx skills add luokai0\u002Fai-agent-skills-by-luo-kai --skill hunting-for-domain-fronting-c2-traffic",{"tool":62,"command":63},"bunx","bunx skills add luokai0\u002Fai-agent-skills-by-luo-kai --skill hunting-for-domain-fronting-c2-traffic",{"tool":65,"command":66},"pnpm","pnpm dlx skills add luokai0\u002Fai-agent-skills-by-luo-kai --skill hunting-for-domain-fronting-c2-traffic","安装技能，技能地址：https:\u002F\u002Fgithub.com\u002Fluokai0\u002Fai-agent-skills-by-luo-kai\u002Fblob\u002Fmain\u002Fai-agent-skills\u002F21-external-registries\u002F08-pinkpixel-collection\u002Fhunting-for-domain-fronting-c2-traffic\u002FSKILL.md",true,[70,75,81],{"path":71,"resourceType":71,"resourceTypeDesc":72,"sizeBytes":73,"sourceHtmlUrl":74},"LICENSE","许可证",11255,"https:\u002F\u002Fgithub.com\u002Fluokai0\u002Fai-agent-skills-by-luo-kai\u002Fblob\u002Fmain\u002Fai-agent-skills\u002F21-external-registries\u002F08-pinkpixel-collection\u002Fhunting-for-domain-fronting-c2-traffic\u002FLICENSE",{"path":76,"resourceType":77,"resourceTypeDesc":78,"sizeBytes":79,"sourceHtmlUrl":80},"references\u002Fapi-reference.md","REFERENCE","参考文档",2120,"https:\u002F\u002Fgithub.com\u002Fluokai0\u002Fai-agent-skills-by-luo-kai\u002Fblob\u002Fmain\u002Fai-agent-skills\u002F21-external-registries\u002F08-pinkpixel-collection\u002Fhunting-for-domain-fronting-c2-traffic\u002Freferences\u002Fapi-reference.md",{"path":82,"resourceType":83,"resourceTypeDesc":84,"sizeBytes":85,"sourceHtmlUrl":86},"scripts\u002Fagent.py","SCRIPT","脚本",6636,"https:\u002F\u002Fgithub.com\u002Fluokai0\u002Fai-agent-skills-by-luo-kai\u002Fblob\u002Fmain\u002Fai-agent-skills\u002F21-external-registries\u002F08-pinkpixel-collection\u002Fhunting-for-domain-fronting-c2-traffic\u002Fscripts\u002Fagent.py",[88,116,133,163,196,233],{"skillNo":89,"name":90,"nameZh":6,"description":91,"descriptionZh":6,"repositoryFullName":8,"ownerLogin":9,"ownerAvatarUrl":10,"ownerAccountNo":11,"ownerDisplayName":12,"repositoryNo":13,"starsCount":14,"licenseSpdxId":92,"licenseFileUrl":6,"sourceHtmlUrl":93,"categories":94,"keywords":95,"publishedAt":39},"01M6F2SKTE208174C7S7JJCZC7","write-contracts","Generates secure Aptos Move V2 smart contracts with Object model, Digital Asset integration, security patterns, and storage type guidance. Includes comprehensive storage decision framework for optimal data structure selection. Triggers on: 'write contract', 'create NFT collection', 'build marketplace', 'implement minting', 'generate Move module', 'create token contract', 'build DAO', 'implement staking'. Ask storage questions when: 'store', 'track', 'registry', 'mapping', 'list', 'collection'.","MIT","https:\u002F\u002Fgithub.com\u002Fluokai0\u002Fai-agent-skills-by-luo-kai\u002Fblob\u002Fmain\u002Fai-agent-skills\u002F22-clawhub-skills\u002Fwrite-contracts\u002FSKILL.md",[],[96,97,98,99,100,101,102,103,104,105,106,107,108,109,110,111,112,113,114,115],"write","contracts","write contracts","storage","secure","create","generate","collection","model","decision","ask","smart-contracts","selection","objects","structure","nft","token","aptos","critical","move",{"skillNo":117,"name":118,"nameZh":6,"description":119,"descriptionZh":6,"repositoryFullName":8,"ownerLogin":9,"ownerAvatarUrl":10,"ownerAccountNo":11,"ownerDisplayName":12,"repositoryNo":13,"starsCount":14,"licenseSpdxId":92,"licenseFileUrl":6,"sourceHtmlUrl":120,"categories":121,"keywords":122,"publishedAt":39},"01M6F2RFXJ6T9MKW0A7N7GM45B","web-search","通用网络搜索技能，支持多引擎搜索（百度、必应、DuckDuckGo），无需API密钥即可获取实时信息","https:\u002F\u002Fgithub.com\u002Fluokai0\u002Fai-agent-skills-by-luo-kai\u002Fblob\u002Fmain\u002Fai-agent-skills\u002F22-clawhub-skills\u002Fweb-search-ex-skill\u002FSKILL.md",[],[123,124,125,126,127,128,129,130,131,132],"web","search","web search","搜索","baidu","bing","duckduckgo","百度","多引擎","internet",{"skillNo":134,"name":135,"nameZh":6,"description":136,"descriptionZh":6,"repositoryFullName":8,"ownerLogin":9,"ownerAvatarUrl":10,"ownerAccountNo":11,"ownerDisplayName":12,"repositoryNo":13,"starsCount":14,"licenseSpdxId":92,"licenseFileUrl":6,"sourceHtmlUrl":137,"categories":138,"keywords":144,"publishedAt":39},"01M6F2K968G1FZEZFPW2E6B222","solo-build","Execute implementation plan tasks with TDD workflow, auto-commit, and phase gates. Use when user says \"build it\", \"start building\", \"execute plan\", \"implement tasks\", \"ship it\", or references a track ID. Do NOT use for planning (use \u002Fplan) or scaffolding (use \u002Fscaffold).","https:\u002F\u002Fgithub.com\u002Fluokai0\u002Fai-agent-skills-by-luo-kai\u002Fblob\u002Fmain\u002Fai-agent-skills\u002F22-clawhub-skills\u002Fsolo-build\u002FSKILL.md",[139],{"categoryNo":140,"categoryName":141,"taxonomyType":142,"taxonomyTypeDesc":143},"01JBSEEDCAT000000000000023","Skill与智能体开发","SCENARIO","使用场景",[145,146,147,148,149,150,151,152,124,153,154,155,96,156,157,158,159,160,161,162],"build","solo","solo build","MCP","workflow","commit","tasks","code","Bash","plan","read","auto","references","context7","query","scaffolding","ship it","project",{"skillNo":164,"name":165,"nameZh":6,"description":166,"descriptionZh":6,"repositoryFullName":8,"ownerLogin":9,"ownerAvatarUrl":10,"ownerAccountNo":11,"ownerDisplayName":12,"repositoryNo":13,"starsCount":14,"licenseSpdxId":92,"licenseFileUrl":6,"sourceHtmlUrl":167,"categories":168,"keywords":175,"publishedAt":39},"01M6F2GKN39SGHSPWYB3662YC8","react-email","Use when building HTML email templates with React components, adding a visual email editor to an application using the React Email visual editor, rendering emails to HTML, or sending emails with Resend. Covers welcome emails, password resets, notifications, order confirmations, newsletters, transactional emails, and the embeddable email editor component.","https:\u002F\u002Fgithub.com\u002Fluokai0\u002Fai-agent-skills-by-luo-kai\u002Fblob\u002Fmain\u002Fai-agent-skills\u002F22-clawhub-skills\u002Freact-email-skills\u002FSKILL.md",[169,172],{"categoryNo":170,"categoryName":171,"taxonomyType":142,"taxonomyTypeDesc":143},"01JBSEEDCAT000000000000005","邮件与沟通",{"categoryNo":173,"categoryName":174,"taxonomyType":142,"taxonomyTypeDesc":143},"01JBSEEDCAT000000000000009","前端开发",[176,177,178,179,180,181,182,183,184,185,186,187,188,189,190,191,192,193,194,195],"react","email","react email","github","editor","components","react components","component","welcome","https","notifications","password","node","use","html","resend","visual","emails","rendering","with",{"skillNo":197,"name":198,"nameZh":6,"description":199,"descriptionZh":6,"repositoryFullName":8,"ownerLogin":9,"ownerAvatarUrl":10,"ownerAccountNo":11,"ownerDisplayName":12,"repositoryNo":13,"starsCount":14,"licenseSpdxId":92,"licenseFileUrl":6,"sourceHtmlUrl":200,"categories":201,"keywords":214,"publishedAt":39},"01M6F2FBVGVDFSG8SSFJGXA40C","APITester Agent-Driven API Testing","Test API endpoints and document responses. Define tests in plain English, run them, get formatted results. Agent-driven Postman alternative.","https:\u002F\u002Fgithub.com\u002Fluokai0\u002Fai-agent-skills-by-luo-kai\u002Fblob\u002Fmain\u002Fai-agent-skills\u002F22-clawhub-skills\u002Fopenclaw-api-tester\u002FSKILL.md",[202,205,208,209],{"categoryNo":203,"categoryName":204,"taxonomyType":142,"taxonomyTypeDesc":143},"01JBSEEDCAT000000000000008","测试与质量",{"categoryNo":206,"categoryName":207,"taxonomyType":142,"taxonomyTypeDesc":143},"01JBSEEDCAT000000000000010","后端与接口",{"categoryNo":140,"categoryName":141,"taxonomyType":142,"taxonomyTypeDesc":143},{"categoryNo":210,"categoryName":211,"taxonomyType":212,"taxonomyTypeDesc":213},"01JBSEEDCAT000000000000030","开发工程师","PROFESSION","适用职业",[215,216,217,218,219,220,221,222,223,224,225,226,227,228,229,230,231,232],"testing","api","api testing","driven","APITester Agent Driven API Testing","test","run","postman","results","plain english","tester","endpoints","document","get","define","tests","english","api-tester",{"skillNo":234,"name":235,"nameZh":6,"description":236,"descriptionZh":6,"repositoryFullName":8,"ownerLogin":9,"ownerAvatarUrl":10,"ownerAccountNo":11,"ownerDisplayName":12,"repositoryNo":13,"starsCount":14,"licenseSpdxId":92,"licenseFileUrl":6,"sourceHtmlUrl":237,"categories":238,"keywords":239,"publishedAt":39},"01M6F273Y3NGAPVJZ608BC0G9G","hubspot-implementation-plan","Generate a phased implementation plan from a HubSpot audit report. Creates prioritized, sequenced cleanup processes with effort estimates, dependencies, and automation feasibility. Use after running \u002Fhubspot-audit.","https:\u002F\u002Fgithub.com\u002Fluokai0\u002Fai-agent-skills-by-luo-kai\u002Fblob\u002Fmain\u002Fai-agent-skills\u002F22-clawhub-skills\u002Fhubspot-implementation-plan\u002FSKILL.md",[],[154,240,241,242,243,244,245,102,246,247,248,249,250,189,251,252,195,253],"implementation","hubspot","hubspot implementation plan","automation","feasibility","cleanup","planning","report","audit","audit report","phased implementation","dependencies","processes","hubspot audit"]