alert http $HOME_NET any -> $EXTERNAL_NET any (msg:"ET MALWARE Win32/Unknown VBScript Backdoor Activity (GET)"; flow:established,to_server; http.method; content:"GET"; http.uri; content:"8tLS0t"; fast_pattern; http.header_names; content:"|0d 0a|Connection|0d 0a|Accept|0d 0a|User-Agent|0d 0a|Host|0d 0a 0d 0a|"; bsize:42; http.user_agent; content:"WinHttpRequest"; reference:url,asec.ahnlab.com/ko/37123/; reference:md5,e8aa5c0309cbc1966674b110a4afd83a; classtype:trojan-activity; sid:2037840; rev:1; metadata:attack_target Client_Endpoint, created_at 2022_07_28, deployment Perimeter, confidence Medium, signature_severity Major, tag Description_Generated_By_Proofpoint_Nexus, updated_at 2022_07_28;)