Rule History

alert dns $HOME_NET any -> any any (msg:"ET MALWARE dYdX NPM Package Backdoor Exfiltration Domain (api .circle-cdn .com) in DNS Lookup"; dns.query; content:"api.circle-cdn.com"; nocase; bsize:18; reference:url,bleepingcomputer.com/news/security/npm-packages-used-by-crypto-exchanges-compromised/; reference:md5,8e87f8857ef2269aaa78930015a45c91; classtype:trojan-activity; sid:2038971; rev:2; metadata:affected_product Linux, attack_target Client_and_Server, created_at 2022_09_23, deployment Perimeter, performance_impact Low, confidence High, signature_severity Major, updated_at 2024_09_18, reviewed_at 2024_09_18;)