alert http $HOME_NET any -> $EXTERNAL_NET any (msg:"ET MALWARE Suspected Jupyter Stealer Related Activity (GET)"; flow:established,to_server; http.start; content:"GET /get/"; startswith; content:".ps1 HTTP/1.1|0d 0a|Host|3a 20|"; distance:0; fast_pattern; http.header_names; content:"|0d 0a|Host|0d 0a|Connection|0d 0a 0d 0a|"; bsize:22; reference:md5,e3bd6b1694b35bef352b2303b46ce522; classtype:trojan-activity; sid:2033645; rev:2; metadata:attack_target Client_Endpoint, created_at 2021_08_02, deployment Perimeter, performance_impact Low, confidence Medium, signature_severity Major, tag Description_Generated_By_Proofpoint_Nexus, updated_at 2021_08_02;)