alert http $EXTERNAL_NET any -> $HOME_NET any (msg:"ET MALWARE Ursnif Payload Downloader Inbound"; flow:established,to_client; http.response_body; content:"|24|path|20 3d 20 24|Env|3a|temp|2b 27|"; startswith; fast_pattern; content:"|27 3b 20 24|client|20 3d 20|New|2d|Object|20|System|2e|Net|2e|WebClient|3b|"; content:"|27 2c 24|path|29 3b 20|Start|2d|Process|20 2d|FilePath|20 24|path"; endswith; reference:url,twitter.com/reecdeep/status/1709916341539320019; classtype:trojan-activity; sid:2048485; rev:1; metadata:affected_product Windows_XP_Vista_7_8_10_Server_32_64_Bit, attack_target Client_Endpoint, created_at 2023_10_06, deployment Perimeter, confidence High, signature_severity Critical, tag Description_Generated_By_Proofpoint_Nexus, updated_at 2023_10_06;)