alert http $HOME_NET any -> $EXTERNAL_NET any (msg:"ET MALWARE Win32/GrandaMisha Sending System Information (POST)"; flow:established,to_server; http.method; content:"POST"; http.uri; content:"/upload?tags="; startswith; fast_pattern; content:"&pass="; distance:0; content:"&cookie="; distance:0; content:"&cc="; distance:0; content:"&hwid="; distance:0; content:"&ip="; distance:0; http.user_agent; content:"ureq/"; startswith; http.request_body; content:"form-data|3b 20|name=|22|document|22 3b 20|filename="; content:"Content-Type|3a 20|application/x-ms-dos-executable"; reference:md5,256ad62aa30b6dfb7755627698d31156; reference:url,twitter.com/benkow_/status/1486700404482134021; classtype:trojan-activity; sid:2034988; rev:1; metadata:attack_target Client_Endpoint, created_at 2022_01_27, deployment Perimeter, malware_family Win32_GrandaMisha, confidence High, signature_severity Major, tag Description_Generated_By_Proofpoint_Nexus, updated_at 2022_01_27;)