alert http $HOME_NET any -> $EXTERNAL_NET any (msg:"ET MALWARE Win32/Kryptik.HMCH Dropper User-Agent M1"; flow:established,to_server; http.header; content:"|0d 0a|User-Agent|3a 20|D3|0d 0a|"; fast_pattern; http.header_names; content:!"|0d 0a|Referer|0d 0a|"; reference:md5,59075c68ce103414d52aabced411043c; classtype:trojan-activity; sid:2033768; rev:2; metadata:affected_product Windows_XP_Vista_7_8_10_Server_32_64_Bit, attack_target Client_Endpoint, created_at 2021_08_23, deployment Perimeter, malware_family Win32_Kryptik_HMCH, confidence High, signature_severity Major, tag Description_Generated_By_Proofpoint_Nexus, updated_at 2024_03_12;)