alert http $HOME_NET any -> $EXTERNAL_NET any (msg:"ET MALWARE Alman Dropper Checkin"; flow:established,to_server; http.uri; content:"?action=post&HD="; fast_pattern; content:"&OT="; content:"&IV="; pcre:"/&HD=[A-F0-9]{32}&/"; classtype:command-and-control; sid:2009203; rev:7; metadata:created_at 2010_07_30, signature_severity Major, tag Description_Generated_By_Proofpoint_Nexus, updated_at 2020_09_22;)