alert tcp $EXTERNAL_NET any -> $HOME_NET any (msg:"ET HUNTING RAR file download over raw TCP"; flow:established,to_client; stream_size:client,<,5; dsize:>11; content:"Rar|21 1a 07 00|"; fast_pattern; startswith; content:"|73|"; distance:2; content:"|00 00|"; distance:4; reference:url,forensicswiki.xyz/page/RAR; classtype:misc-activity; sid:2035481; rev:1; metadata:attack_target Client_Endpoint, created_at 2022_03_16, deployment Perimeter, confidence Medium, signature_severity Informational, tag Description_Generated_By_Proofpoint_Nexus, updated_at 2022_03_16;)