alert http $HOME_NET 9000 -> $EXTERNAL_NET any (msg:"ET MALWARE PNScan.2 Inbound Status Check Response"; flow:established,from_server; flowbits:isset,ET.PNScan.2; http.header; content:"Content-Length|3a 20|12|0d 0a|"; file.data; content:"{|22|status|22 3a|1}"; fast_pattern; reference:url,blog.malwaremustdie.org/2016/08/mmd-0054-2016-pnscan-elf-worm-that.html; reference:url,vms.drweb.com/virus/?_is=1&i=7299536; classtype:trojan-activity; sid:2023088; rev:4; metadata:affected_product Linux, attack_target Client_Endpoint, created_at 2016_08_25, deployment Perimeter, deployment Datacenter, malware_family PNScan_2, performance_impact Low, signature_severity Major, updated_at 2020_10_06;)