Rule History

alert http $HOME_NET any -> $EXTERNAL_NET any (msg:"ET MALWARE Win32/Grandoreiro Related Activity (GET)"; flow:established,to_server; http.method; content:"GET"; http.uri; content:"|2f 24|TIME"; bsize:6; http.host; pcre:"/^(?:[0-9]{1,3}\.){3}[0-9]{1,3}$/"; http.user_agent; content:"|28|compatible|3b 20|Clever|20|Internet|20|Suite|29|"; endswith; fast_pattern; reference:md5,9b1160a7c9a6b94effe25fd4e04797d3; reference:url,www.zscaler.com/blogs/security-research/grandoreiro-banking-trojan-new-ttps-targeting-various-industry-verticals; classtype:trojan-activity; sid:2038619; rev:1; metadata:affected_product Windows_XP_Vista_7_8_10_Server_32_64_Bit, attack_target Client_Endpoint, created_at 2022_08_25, deployment Perimeter, malware_family Grandoreiro, confidence High, signature_severity Major, tag Description_Generated_By_Proofpoint_Nexus, updated_at 2022_09_13, reviewed_at 2025_10_24;)