alert tcp $HOME_NET any -> $EXTERNAL_NET any (msg:"ET MALWARE Win32/Sharik Checkin"; flow:established,to_server; dsize:10; content:"34feGaeRAd"; fast_pattern; reference:md5,f9f30307ca22d092c02701c108aa6402; classtype:command-and-control; sid:2018614; rev:2; metadata:created_at 2014_06_30, malware_family Win32_Sharik, signature_severity Major, tag Description_Generated_By_Proofpoint_Nexus, updated_at 2019_10_08;)