alert http $HOME_NET any -> $EXTERNAL_NET any (msg:"ET MALWARE Win32/LockScreen CnC HTTP Pattern"; flow:established,to_server; http.method; content:"GET"; http.uri; content:",0x"; fast_pattern; pcre:"/(?:,0x[0-9a-f]{2}){10}$/"; http.header_names; content:"|0d 0a|Host|0d 0a 0d 0a|"; bsize:10; reference:md5,8df8d0cd70f96538211c65fb6361704d; classtype:command-and-control; sid:2022494; rev:4; metadata:created_at 2016_02_08, malware_family Win32_LockScreen, confidence High, signature_severity Major, updated_at 2020_10_05;)