alert tcp $EXTERNAL_NET any -> $HOME_NET any (msg:"ET MALWARE Win32/Sharik C2 Incoming Crafted Request"; flow:established,from_server; content:"|4d 00 02 02 00|"; depth:5; fast_pattern; content:"/"; distance:4; within:5; content:" HTTP/1."; distance:0; reference:md5,f9f30307ca22d092c02701c108aa6402; classtype:command-and-control; sid:2018616; rev:1; metadata:created_at 2014_06_30, malware_family Win32_Sharik, signature_severity Major, tag Description_Generated_By_Proofpoint_Nexus, updated_at 2019_07_26;)