alert tcp $EXTERNAL_NET any -> $HOME_NET any (msg:"ET MALWARE MSIL/Crimson Receiving Command (getavs)"; flow:established,to_client; content:"|00 00 00 00|getavs="; offset:1; depth:11; fast_pattern; reference:md5,0f0f6f48c3ee5f8e7cd3697c40002bc7; classtype:trojan-activity; sid:2036286; rev:1; metadata:affected_product Windows_XP_Vista_7_8_10_Server_32_64_Bit, attack_target Client_Endpoint, created_at 2018_08_08, deployment Perimeter, malware_family MSIL_Crimson, performance_impact Moderate, confidence High, signature_severity Major, updated_at 2019_07_26;)