alert http $HOME_NET any -> $EXTERNAL_NET any (msg:"ET MALWARE NSO Group Pegasus Related Data Exfil (POST) M3"; flow:established,to_server; http.method; content:"POST"; http.uri; content:".php"; endswith; http.header_names; content:"|0d 0a|Content-Type|0d 0a|Host|0d 0a|Content-Length|0d 0a|Expect|0d 0a 0d 0a|"; bsize:48; fast_pattern; http.request_body; content:"silly=./"; startswith; content:"&kusr="; distance:0; reference:url,www.trendmicro.com/en_us/research/21/h/confucius-uses-pegasus-spyware-related-lures-to-target-pakistani.html; reference:md5,0a1c6d9cd67172995d22fa54946662f0; classtype:trojan-activity; sid:2033778; rev:1; metadata:attack_target Client_Endpoint, created_at 2021_08_24, deployment Perimeter, performance_impact Low, confidence High, signature_severity Major, tag Description_Generated_By_Proofpoint_Nexus, updated_at 2021_08_24;)