alert http $HOME_NET any -> $EXTERNAL_NET any (msg:"ET MALWARE Maldoc Retrieving Payload 2021-07-06"; flow:established,to_server; http.uri; pcre:"/\.(?:exe|dll)$/"; http.user_agent; content:"charris"; fast_pattern; startswith; http.header_names; to_lowercase; content:!"|0d 0a|referer|0d 0a|"; content:"|0d 0a|ua-cpu|0d 0a|"; reference:md5,fda11c3ab0a8f8fb190456842974583c; classtype:trojan-activity; sid:2033253; rev:3; metadata:affected_product Windows_XP_Vista_7_8_10_Server_32_64_Bit, attack_target Client_Endpoint, created_at 2021_07_06, deployment Perimeter, confidence High, signature_severity Major, tag Description_Generated_By_Proofpoint_Nexus, updated_at 2024_04_29;)