alert http $HOME_NET any -> $EXTERNAL_NET any (msg:"ET MALWARE Suspected Lazarus APT Related Backdoor Activity (POST) M1"; flow:established,to_server; http.method; content:"POST"; http.uri; content:".asp"; endswith; http.content_type; content:"application/x-www-form-urlencoded"; bsize:33; http.request_body; content:"jsessid=60d49d"; fast_pattern; content:"cookie="; http.header_names; content:!"Referer|0d 0a|"; reference:url,securelist.com/lazarus-trojanized-defi-app/106195/; reference:md5,0b9f4612cdfe763b3d8c8a956157474a; classtype:trojan-activity; sid:2035692; rev:3; metadata:attack_target Client_Endpoint, created_at 2022_04_01, deployment Perimeter, malware_family Lazarus, confidence Medium, signature_severity Major, tag Description_Generated_By_Proofpoint_Nexus, updated_at 2023_03_02;)