alert http $HOME_NET any -> $EXTERNAL_NET any (msg:"ET MALWARE APT34 Related Activity (GET)"; flow:established,to_server; http.method; content:"GET"; http.uri; content:"/?id="; startswith; fast_pattern; content:"&formid="; distance:0; http.header_names; content:!"Referer"; reference:md5,e2919dea773eb0796e46e126dbce17b1; reference:url,twitter.com/360CoreSec/status/1408348476660797440; classtype:trojan-activity; sid:2033083; rev:1; metadata:attack_target Client_Endpoint, created_at 2021_06_03, deployment Perimeter, performance_impact Low, confidence High, signature_severity Major, tag Description_Generated_By_Proofpoint_Nexus, updated_at 2021_06_03;)