alert http $HOME_NET any -> $EXTERNAL_NET any (msg:"ET MALWARE Lazarus APT Related Loader Activity (GET)"; flow:established,to_server; http.method; content:"GET"; http.uri; content:"/fontsupdate?_sid="; startswith; fast_pattern; content:"&_ts="; distance:0; content:"&_agent="; distance:0; http.user_agent; content:"WinInetGet/0.1"; bsize:14; reference:md5,a966668feca72d8dddf3c737d4908a29; reference:url,media.kasperskycontenthub.com/wp-content/uploads/sites/43/2023/10/18092216/Updated-MATA-attacks-Eastern-Europe_full-report_ENG.pdf; classtype:trojan-activity; sid:2049691; rev:1; metadata:attack_target Client_Endpoint, created_at 2023_12_14, deployment Perimeter, deployment SSLDecrypt, confidence Medium, signature_severity Major, tag Description_Generated_By_Proofpoint_Nexus, updated_at 2023_12_14; target:src_ip;)