alert http $HOME_NET any -> $EXTERNAL_NET any (msg:"ET MALWARE HTTPCore CnC Task Request"; flow:established,to_server; http.method; content:"POST"; http.uri; content:"/req_"; content:".txt"; distance:32; within:4; endswith; http.user_agent; bsize:115; content:"Mozilla/5.0 (Windows NT 10.0|3b 20|Win64|3b 20|x64) AppleWebKit/537.36 (KHTML, like Gecko) Chrome/77.0.3865.120 Safari/537.36"; reference:url,www.cyber.gov.au/sites/default/files/2020-06/ACSC-Advisory-2020-008-Copy-Paste-Compromises.pdf; classtype:command-and-control; sid:2030363; rev:1; metadata:affected_product Windows_XP_Vista_7_8_10_Server_32_64_Bit, attack_target Client_Endpoint, created_at 2020_06_19, deployment Perimeter, confidence Medium, signature_severity Major, tag Description_Generated_By_Proofpoint_Nexus, updated_at 2020_06_19;)