alert http $HOME_NET any -> $EXTERNAL_NET any (msg:"ET MALWARE Win32/Pteranodon CnC Exfil (POST) M2"; flow:established,to_server; http.method; content:"POST"; http.header_names; content:!"Referer"; http.request_body; content:"username="; startswith; content:"_"; within:255; content:"&cart=FV&"; fast_pattern; distance:0; content:"-"; within:12; content:"="; within:12; pcre:"/^\d+$/R"; reference:url,unit42.paloaltonetworks.com/gamaredon-primitive-bear-ukraine-update-2021; reference:md5,b5120dcc0f2682cb6fb2a4f68dcbbb0b; classtype:trojan-activity; sid:2035119; rev:2; metadata:affected_product Windows_XP_Vista_7_8_10_Server_32_64_Bit, attack_target Client_Endpoint, created_at 2022_02_07, deployment Perimeter, malware_family Win32_Pteranodon, confidence High, signature_severity Major, tag Description_Generated_By_Proofpoint_Nexus, updated_at 2022_02_07, reviewed_at 2024_06_26;)