[{"data":1,"prerenderedAt":-1},["ShallowReactive",2],{"$fq-7gd84MPc3gFbtxL2r3RuCHoeUwJY0Hmsr7Jy0m-AU":3},{"lesson":4},{"id":5,"slug":6,"article_id":7,"title":8,"body":9,"prevention":10,"framework_refs":11,"framework_notes":22,"status":23,"created_at":24,"published_at":25,"article":26,"tags":30,"podcasts":49,"controls":50},"5bcd1bca-1540-4539-8767-98cd8beb9598","clickfix-abuses-polygon-blockchain-to-hide-c2-infrastructure-across-31-orgs","59228901-ab84-465b-a341-fc346e4d7ec6","ClickFix Abuses Polygon Blockchain to Hide C2 Infrastructure Across 31 Orgs","The ClickFix campaign exploited the immutable and decentralized nature of the Polygon blockchain to store and rotate command-and-control server addresses using a technique called EtherHiding. Because blockchain transactions cannot be deleted or easily blocked at the source, traditional domain takedown and IP blacklisting defenses are rendered largely ineffective. This represents a significant evolution in attacker tradecraft, where legitimate public infrastructure is weaponized to evade detection and disruption. Organizations that rely solely on static threat intelligence feeds or domain-based blocking failed to detect or intercept the malicious traffic. The campaign's success across 31 organizations underscores a dangerous gap in awareness of emerging evasion techniques and the monitoring of outbound traffic to blockchain RPC endpoints.","**Immediate actions:**\n- Block or restrict outbound connections to public blockchain RPC endpoints (e.g., Polygon, Ethereum) at the perimeter firewall unless explicitly required by business operations.\n- Hunt for indicators of compromise associated with ClickFix\u002FEtherHiding across endpoint and network logs immediately.\n- Deploy behavioral-based endpoint detection rules to flag unusual processes querying blockchain APIs or executing scripts from clipboard input.\n\n**Long-term improvements:**\n- Implement application-layer inspection and egress filtering to detect and alert on anomalous outbound traffic patterns to decentralized web endpoints.\n- Establish a threat intelligence program that tracks emerging C2 evasion techniques, including blockchain-based infrastructure abuse.\n- Conduct regular red team exercises that simulate novel C2 channels to validate detection and response capabilities.\n\n**Detection measures:**\n- Configure SIEM rules to alert on process executions or network calls originating from user-facing applications (browsers, office tools) that reach blockchain RPC URLs.\n- Baseline and monitor DNS and HTTP traffic for connections to known Web3 providers (e.g., Infura, Alchemy, Polygon RPC nodes) from non-development endpoints.\n- Enable user and entity behavior analytics (UEBA) to detect anomalous script execution patterns consistent with ClickFix-style clipboard hijacking lures.",[12,13,14,15,16,17,18,19,20,21],"CIS Control 9: Email and Web Browser Protections","CIS Control 13: Network Monitoring and Defense","CIS Control 10: Malware Defenses","NIST SP 800-53 SI-3: Malicious Code Protection","NIST SP 800-53 SC-7: Boundary Protection","NIST SP 800-53 AU-12: Audit Record Generation","NIST CSF DE.CM-1: Network Monitoring","MITRE ATT&CK T1102: Web Service (C2 via legitimate web services)","MITRE ATT&CK T1071: Application Layer Protocol","MITRE ATT&CK T1204: User Execution (ClickFix social engineering lure)",{},"published","2026-09-01T16:21:50.592723+00:00","2026-09-01T16:21:50.475+00:00",{"id":7,"url":27,"slug":28,"title":29},"https:\u002F\u002Fwww.darkreading.com\u002Fendpoint-security\u002Fclickfix-campaign-comprises-31-orgs-abuses-polygon-blockchain","clickfix-campaign-compromises-31-orgs-abuses-polygon-blockchain-c4b7fe","ClickFix Campaign Compromises 31 Orgs, Abuses Polygon Blockchain",[31,37,43],{"id":32,"name":33,"slug":34,"description":35,"color":36},"1732a005-556e-411c-a9db-5edec3058571","Logging & Monitoring","logging-monitoring","Missing logs, no alerting, blind spots","#a855f7",{"id":38,"name":39,"slug":40,"description":41,"color":42},"182e11d5-57c4-444e-8ec8-4682ad60261b","Incident Response","incident-response","Slow detection, poor containment, missing playbooks","#14b8a6",{"id":44,"name":45,"slug":46,"description":47,"color":48},"7261eb8f-acd4-4d93-a489-7fdd652ec0ea","Security Awareness","security-awareness","Phishing, social engineering, human error","#22c55e",[],[51,55,59],{"slug":52,"name":53,"problem":54},"endpoint-detection-response","Endpoint detection and response (EDR and XDR)","Malware and hands-on-keyboard attackers on laptops and servers get spotted and stopped.",{"slug":56,"name":57,"problem":58},"threat-intelligence","Threat intelligence","Attack campaigns reach your sector, suppliers or software before your team hears about them.",{"slug":60,"name":61,"problem":62},"dns-web-filtering","DNS filtering and secure web gateway","Users cannot reach known-malicious sites, and malware cannot phone home."]