Rule History

alert http $HOME_NET any -> $EXTERNAL_NET any (msg:"ET MALWARE Suspected APT43 BRAVEPRINCE Related Activity (GET)"; flow:established,to_server; http.method; content:"GET"; http.uri.raw; content:"/login?url=http|25 33 41 25 32 46 25 32 46|mail.daum.net|25 32 46|"; startswith; fast_pattern; http.user_agent; content:"Mozilla/5.0 (Windows NT 5.2|3b 20|rv|3a|12.0) Gecko/20100101 Firefox/12.0"; bsize:65; http.header_names; content:!"Referer|0d 0a|"; reference:md5,33df74cbb60920d63fe677c6f90b63f9; reference:url,mandiant.widen.net/s/zvmfw5fnjs/apt43-report; classtype:trojan-activity; sid:2044824; rev:1; metadata:attack_target Client_Endpoint, created_at 2023_03_29, deployment Perimeter, deployment SSLDecrypt, performance_impact Low, confidence Medium, signature_severity Major, tag Description_Generated_By_Proofpoint_Nexus, updated_at 2023_03_29; target:src_ip;)