alert http $EXTERNAL_NET any -> $HOME_NET any (msg:"ET SHELLCODE UTF-8/16 Encoded Shellcode"; flow:established,to_client; file.data; content:"|5C|u"; fast_pattern; nocase; content:"|5C|u"; nocase; within:6; content:"|5C|u"; nocase; within:6; content:"|5C|u"; nocase; within:6; content:"|5C|u"; nocase; within:6; pcre:"/\x5Cu[a-f,0-9]{2,4}\x5Cu[a-f,0-9]{2,4}\x5Cu[a-f,0-9]{2,4}/i"; reference:url,www.sophos.com/security/technical-papers/malware_with_your_mocha.html; classtype:bad-unknown; sid:2012510; rev:3; metadata:created_at 2011_03_16, confidence High, signature_severity Major, updated_at 2024_04_09;)