alert tcp $EXTERNAL_NET any -> $HOME_NET any (msg:"ET MALWARE Andariel Backdoor Actvity (Response)"; flow:established,to_client; content:"HTTP|20|1.1|20|200|20|OK|20|SSL2.1"; fast_pattern; startswith; reference:url,securelist.com/andariel-evolves-to-target-south-korea-with-ransomware/102811/; reference:md5,569246a3325effa11cb8ff362428ab2c; classtype:command-and-control; sid:2033147; rev:1; metadata:attack_target Client_Endpoint, created_at 2021_06_16, deployment Perimeter, malware_family Lazarus, malware_family Andariel, performance_impact Low, confidence High, signature_severity Major, tag Backdoor, tag Description_Generated_By_Proofpoint_Nexus, updated_at 2021_06_16;)