alert http $EXTERNAL_NET any -> $HOME_NET any (msg:"ET SHELLCODE Common 0a0a0a0a Heap Spray String"; flow:established,to_client; content:"0a0a0a0a"; nocase; threshold:type limit,count 1,seconds 300,track by_src; reference:url,www.darkreading.com/vulnerabilities---threats/heap-spraying-attackers-latest-weapon-of-choice/d/d-id/1132487; classtype:shellcode-detect; sid:2012252; rev:6; metadata:created_at 2011_02_03, deployment alert_only, confidence Low, signature_severity Major, updated_at 2025_02_04;)