alert http $HOME_NET any -> $EXTERNAL_NET any (msg:"ET MALWARE OilRig APT PowDesk Powershell Check"; flow:established,to_server; http.method; content:"GET"; http.uri; content:"/reclaimlandesk.php?devicename="; fast_pattern; content:"&result="; distance:0; http.uri.raw; content:!"Missing%20LANDESK"; http.header_names; content:"|0d 0a|Host|0d 0a|Connection|0d 0a 0d 0a|"; depth:22; endswith; reference:url,twitter.com/ClearskySec/status/1209055280090288131; reference:md5,2de2e528991ac2d85aa8f12fce5351ad; classtype:command-and-control; sid:2029189; rev:3; metadata:affected_product Windows_XP_Vista_7_8_10_Server_32_64_Bit, attack_target Client_Endpoint, created_at 2019_12_23, deployment Perimeter, confidence High, signature_severity Major, tag Description_Generated_By_Proofpoint_Nexus, updated_at 2020_10_27;)