alert http $HOME_NET any -> $EXTERNAL_NET any (msg:"ET MALWARE Patchwork Backdoor Checkin"; flow:established,to_server; http.method; content:"POST"; http.uri; bsize:13; content:"/cnc/register"; fast_pattern; http.request_body; content:"|7b 22|host_identifier|22 3a 22|"; startswith; content:"|22 7d|"; distance:36; within:2; endswith; reference:url,app.any.run/tasks/d6f9aecc-42be-4703-aadd-572ed1f4573f/; reference:url,twitter.com/JAMESWT_MHT/status/1225014535591026688; classtype:command-and-control; sid:2029395; rev:1; metadata:affected_product Windows_XP_Vista_7_8_10_Server_32_64_Bit, attack_target Client_Endpoint, created_at 2020_02_06, deployment Perimeter, deployment SSLDecrypt, malware_family Backdoor, performance_impact Low, confidence High, signature_severity Major, tag Patchwork, tag Description_Generated_By_Proofpoint_Nexus, updated_at 2020_02_06;)