alert tcp $EXTERNAL_NET any -> $HOME_NET any (msg:"ET MALWARE MSIL/Crimson Receiving Command (folders list)"; flow:established,from_server; content:"fldr="; offset:5; byte_jump:4,0,little,from_beginning,post_offset 4; isdataat:!2,relative; reference:md5,94d29dded4dfd920fc4153f18e82fc6c; classtype:trojan-activity; sid:2036284; rev:3; metadata:created_at 2016_02_17, malware_family MSIL_Crimson, confidence High, signature_severity Major, tag Description_Generated_By_Proofpoint_Nexus, updated_at 2019_07_26;)