alert http $HOME_NET any -> $EXTERNAL_NET any (msg:"ET MALWARE Win32/Kryptik.HCZR Variant Initial Checkin"; flow:established,to_server; http.method; content:"GET"; http.uri; content:"/?wqasd="; startswith; content:"&qrjatyd=imofugclqu"; fast_pattern; endswith; http.header_names; content:"|0d 0a|Host|0d 0a 0d 0a|"; reference:md5,9163f1f4f16ac8ec82eaa0a274850c36; reference:url,twitter.com/3XS0/status/1255491188565688323; classtype:command-and-control; sid:2030054; rev:1; metadata:affected_product Windows_XP_Vista_7_8_10_Server_32_64_Bit, attack_target Client_Endpoint, created_at 2020_04_29, deployment Perimeter, deployment SSLDecrypt, malware_family Win32_Kryptik_HCZR, performance_impact Low, confidence High, signature_severity Major, tag Description_Generated_By_Proofpoint_Nexus, updated_at 2020_04_29;)