alert http $HOME_NET any -> $EXTERNAL_NET any (msg:"ET MALWARE Lazarus Group Comebacker Backdoor CnC Checkin"; flow:established,to_server; http.method; content:"POST"; http.uri; pcre:"/^\/(download\/download|user\/agency|manage\/manage|upload\/upload)/"; content:".asp"; endswith; http.request_body; content:"|3d|MgAwADIA"; fast_pattern; reference:url,blogs.jpcert.or.jp/en/2024/02/lazarus_pypi.html; classtype:trojan-activity; sid:2051149; rev:1; metadata:affected_product Windows_XP_Vista_7_8_10_Server_32_64_Bit, attack_target Client_Endpoint, tls_state plaintext, created_at 2024_02_28, deployment Perimeter, malware_family Comebacker, performance_impact Low, confidence High, signature_severity Major, tag Lazarus, tag Description_Generated_By_Proofpoint_Nexus, updated_at 2024_02_28; target:src_ip;)