alert http $EXTERNAL_NET any -> $HOME_NET any (msg:"ET MALWARE Andromeda Check-in Response"; flow:established,to_client; http.header; content:"Content-Length|3a 20|9|0d 0a|"; file.data; content:"|6C 95 32 CB|"; within:4; classtype:trojan-activity; sid:2015896; rev:5; metadata:created_at 2012_11_20, signature_severity Major, tag Description_Generated_By_Proofpoint_Nexus, updated_at 2020_09_02;)