alert http $EXTERNAL_NET any -> $HOME_NET any (msg:"ET MALWARE PurpleFox Backdoor/Rootkit Download Server Response M1"; flow:established,to_client; http.stat_code; content:"200"; http.content_type; content:"application/octet-stream"; bsize:24; http.server; content:"HFS|20|"; startswith; http.cookie; content:"HFS_SID_="; startswith; http.response_body; content:"Rar!|1a 07 01 00|"; startswith; content:"rundll3222.exe"; within:150; fast_pattern; reference:url,blog.minerva-labs.com/malicious-telegram-installer-drops-purple-fox-rootkit; classtype:trojan-activity; sid:2034856; rev:2; metadata:affected_product Windows_XP_Vista_7_8_10_Server_32_64_Bit, attack_target Client_Endpoint, created_at 2022_01_05, deployment Perimeter, malware_family PurpleFox, confidence High, signature_severity Major, tag Description_Generated_By_Proofpoint_Nexus, updated_at 2022_01_05;)