alert http $HOME_NET any -> $EXTERNAL_NET any (msg:"ET MALWARE Win32/Kryptik.FVVZ Variant CnC Checkin 2"; flow:established,to_server; http.method; content:"GET"; http.uri; content:".php?hwid="; fast_pattern; content:"&taskid="; distance:0; content:"&status="; distance:0; http.header_names; content:!"User-Agent|0d 0a|"; content:!"Accept"; content:!"Referer|0d 0a|"; reference:md5,92c3157d76c67668ca815541c6bb3ba8; classtype:command-and-control; sid:2024692; rev:3; metadata:affected_product Windows_XP_Vista_7_8_10_Server_32_64_Bit, attack_target Client_Endpoint, created_at 2017_09_11, deployment Perimeter, malware_family Win32_Kryptik_FVVZ, performance_impact Moderate, confidence High, signature_severity Major, updated_at 2020_08_12;)