alert icmp $HOME_NET any -> $EXTERNAL_NET any (msg:"ET MALWARE Trickbot/Anchor ICMP Request"; itype:8; content:"hanc"; depth:4; content:"|08 00|"; distance:16; within:2; isdataat:!1,relative; reference:url,github.com/sysopfb/open_mal_analysis_notes/blob/master/546bf4fc684c5d1e17b204a28c795a414124335b6ef7cbadf52ae8fbadcb2a4a.md; classtype:trojan-activity; sid:2030698; rev:1; metadata:affected_product Windows_XP_Vista_7_8_10_Server_32_64_Bit, attack_target Client_Endpoint, created_at 2020_08_18, deployment Perimeter, malware_family Anchor, confidence High, signature_severity Major, updated_at 2020_08_18;)