alert tcp $HOME_NET any -> $EXTERNAL_NET any (msg:"ET MALWARE Andariel Backdoor Activity (Checkin)"; flow:established,to_server; content:"HTTP|20|1.1|20|/member.php|20|SSL3.4"; fast_pattern; startswith; reference:url,securelist.com/andariel-evolves-to-target-south-korea-with-ransomware/102811/; reference:md5,569246a3325effa11cb8ff362428ab2c; classtype:command-and-control; sid:2033146; rev:1; metadata:affected_product Windows_XP_Vista_7_8_10_Server_32_64_Bit, attack_target Client_Endpoint, created_at 2021_06_16, deployment Perimeter, malware_family Lazarus, malware_family Andariel, confidence High, signature_severity Major, tag Backdoor, tag Description_Generated_By_Proofpoint_Nexus, updated_at 2021_06_16;)