alert http $HOME_NET any -> $EXTERNAL_NET any (msg:"ET MALWARE Possible Puzzlemaker Remote Shell Activity (GET)"; flow:established,to_server; http.method; content:"GET"; http.uri; content:"/analytics"; bsize:10; http.header_names; content:"|0d 0a|Connection|0d 0a|User-Agent|0d 0a|Host|0d 0a 0d 0a|"; bsize:34; fast_pattern; http.user_agent; content:"Win64|3b|"; content:"Chrome/"; reference:md5,d6b850c950379d5ee0f254f7164833e8; reference:url,securelist.com/puzzlemaker-chrome-zero-day-exploit-chain/102771/; classtype:trojan-activity; sid:2033128; rev:1; metadata:affected_product Windows_XP_Vista_7_8_10_Server_32_64_Bit, attack_target Client_Endpoint, created_at 2021_06_09, deployment Perimeter, deployment SSLDecrypt, confidence Medium, signature_severity Major, tag RAT, tag Description_Generated_By_Proofpoint_Nexus, updated_at 2021_06_09;)