alert tcp $HOME_NET any -> $EXTERNAL_NET any (msg:"ET MALWARE MSIL/Modi RAT CnC Screenshot Outbound"; flow:established,to_server; content:"|40 7c 7c|"; depth:3; content:"|FF D8 FF E0 00 10 4A 46 49 46 00 01|"; within:100; content:"|7c|Boss2019|7c|"; fast_pattern; isdataat:!1,relative; reference:md5,d09be7dd3433a0b6fc2bc729f181a1f0; classtype:command-and-control; sid:2030143; rev:3; metadata:affected_product Windows_DNS_server, attack_target Client_Endpoint, created_at 2020_05_11, deployment Perimeter, malware_family ModiRAT, confidence High, signature_severity Major, updated_at 2020_11_12;)