alert http $EXTERNAL_NET any -> $HOME_NET any (msg:"ET EXPLOIT_KIT Astrum EK Landing"; flow:established,from_server; file_data; content:"%65%64%6f%43%72%61%68%43%6d%6f%72%66"; content:"%74%41%65%64%6f%43%72%61%68%63"; classtype:exploit-kit; sid:2019131; rev:6; metadata:created_at 2014_09_08, confidence High, signature_severity Major, tag Description_Generated_By_Proofpoint_Nexus, updated_at 2019_07_26;)