alert http $HOME_NET any -> $EXTERNAL_NET any (msg:"ET MALWARE Maldoc Activity Sending Windows User Info (GET)"; flow:established,to_server; http.method; content:"GET"; http.uri; content:"/uralchem/"; startswith; fast_pattern; pcre:"/^[a-zA-z]{8}\./R"; http.header_names; content:!"Referer"; reference:md5,7a7bc6e080657fc77acbcf91d1892d31; reference:url,twitter.com/ShadowChasing1/status/1417650046485495808; classtype:trojan-activity; sid:2033454; rev:1; metadata:attack_target Client_Endpoint, created_at 2021_07_27, deployment Perimeter, performance_impact Low, confidence High, signature_severity Major, tag Description_Generated_By_Proofpoint_Nexus, updated_at 2021_07_27;)