alert http $HOME_NET any -> $EXTERNAL_NET any (msg:"ET TROJAN Buer Loader Update Request"; flow:established,to_server; urilen:>200; content:"GET"; http_method; content:"/api/update/"; depth:12; http_uri; pcre:"/^(?:[A-Za-z0-9+/]{4})*(?:[A-Za-z0-9+/]{2}==|[A-Za-z0-9+/]{3}=|[A-Za-z0-9+/]{4})$/UR"; content:"Mozilla/5.0 (Windows NT 10.0|3b 20|Win64|3b 20|x64) AppleWebKit?/537.36 (KHTML, like Gecko) Chrome/60.0.3112.113 Safari/537.36"; http_user_agent; http_header_names; content:!"Accept"; content:!"Referer"; metadata: former_category MALWARE; reference:md5,a8819db1fa758fd9f1d501dbb50f454f; classtype:trojan-activity; sid:2029077; rev:1; metadata:affected_product Windows_XP_Vista_7_8_10_Server_32_64_Bit, attack_target Client_Endpoint, deployment Perimeter, signature_severity Major, created_at 2019_11_12, updated_at 2019_11_12;)

Added 2019-12-02 18:05:00 UTC