alert http $EXTERNAL_NET any -> $HOME_NET any (msg:"ET MALWARE ChaChi RAT Server Response"; flow:established,to_client; flowbits:isset,ET.chachirat; http.stat_code; content:"200"; file.data; content:"-zig"; endswith; fast_pattern; reference:url,blogs.blackberry.com/en/2021/06/pysa-loves-chachi-a-new-golang-rat; reference:md5,9976373177d217207a692a6d0867e9c4; classtype:trojan-activity; sid:2033183; rev:2; metadata:affected_product Windows_XP_Vista_7_8_10_Server_32_64_Bit, attack_target Client_Endpoint, created_at 2021_06_24, deployment Perimeter, confidence High, signature_severity Major, tag RAT, tag Description_Generated_By_Proofpoint_Nexus, updated_at 2023_10_11, reviewed_at 2023_10_11;)