alert http1 $HOME_NET any -> $EXTERNAL_NET any (msg:"ET MALWARE Win32/RisePro CnC Activity (GET)"; flow:established,to_server; http.method; content:"GET"; http.uri; bsize:<180; content:"/doc"; startswith; pcre:"/^(?:[0-9]{9})_(?:[0-9]{9})\x3fhash=(?:[a-zA-Z0-9]{43})&dl=(?:[0-9A-Z]{15}):(?:[0-9]{10}):(?:[a-zA-Z0-9]{43})&api=\d&no_preview=\d/R"; http.user_agent; bsize:114; content:"Mozilla|2f|5|2e|0|20 28|Windows|20|NT|20|10|2e|0|3b 20|Win64|3b 20|x64|29 20|AppleWebKit|2f|537|2e|36|20 28|KHTML|2c 20|like|20|Gecko|29 20|Chrome|2f|93|2e|0|2e|4577|2e|63|20|Safari|2f|537|2e|36"; fast_pattern; http.header_names; bsize:37; content:"|0d 0a|User-Agent|0d 0a|Host|0d 0a|Cache-Control|0d 0a 0d 0a|"; content:!"Referer"; reference:url,flashpoint.io/blog/risepro-stealer-and-pay-per-install-malware-privateloader; classtype:command-and-control; sid:2042988; rev:4; metadata:affected_product Windows_XP_Vista_7_8_10_Server_32_64_Bit, attack_target Client_Endpoint, created_at 2022_12_21, deployment Perimeter, deployment SSLDecrypt, malware_family Win32_RisePro, confidence High, signature_severity Major, tag Description_Generated_By_Proofpoint_Nexus, updated_at 2024_04_03, reviewed_at 2025_10_24;)