alert http $HOME_NET any -> $EXTERNAL_NET any (msg:"ET MALWARE Possible Darkhotel Higasia Downloader Requesting Module"; flow:established,to_server; http.method; content:"GET"; http.uri; content:"/file/start?session="; depth:20; fast_pattern; content:"&imsi="; within:20; content:".exe"; endswith; reference:md5,0e1ed07bae97d8b1cc4dcfe3d56ea3ee; reference:url,github.com/blackorbird/APT_REPORT/blob/master/Darkhotel/higaisa/higaisa_apt_report.pdf; classtype:command-and-control; sid:2028934; rev:4; metadata:affected_product Windows_XP_Vista_7_8_10_Server_32_64_Bit, attack_target Client_Endpoint, created_at 2019_11_04, deployment Perimeter, confidence Medium, signature_severity Major, tag Description_Generated_By_Proofpoint_Nexus, updated_at 2022_03_24;)