alert tcp $HOME_NET any -> $EXTERNAL_NET 80 (msg:"ET MALWARE Cobalt Strike Stager Time Check M1"; flow:established,to_server; dsize:11; content:"GET|20|driver|0a|"; fast_pattern; reference:md5,e566c853fe8555fc255bd643f96ba574; classtype:trojan-activity; sid:2032784; rev:2; metadata:affected_product Windows_XP_Vista_7_8_10_Server_32_64_Bit, attack_target Client_Endpoint, created_at 2021_04_20, deployment Perimeter, malware_family Cobalt_Strike, confidence Medium, signature_severity Major, tag Description_Generated_By_Proofpoint_Nexus, updated_at 2021_04_20;)