Rule History

alert tcp $EXTERNAL_NET ![443,80] -> $HOME_NET any (msg:"ET MALWARE ELF/MooBot Mirai DDoS Variant Server Response M2"; flow:established,to_client; dsize:<48; content:"|00 00 00 3c|"; startswith; fast_pattern; content:"|01|"; distance:1; within:1; content:"|20|"; distance:4; within:1; pcre:"/^[\x01-\x04]/R"; reference:md5,b3be367b4868d39d6978d27f4d4dfaaf; reference:url,www.fortinet.com/blog/threat-research/mirai-based-botnet-moobot-targets-hikvision-vulnerability; reference:url,blog.netlab.360.com/ddos-botnet-moobot-en/; classtype:command-and-control; sid:2034640; rev:2; metadata:affected_product Linux, attack_target Client_Endpoint, created_at 2021_12_09, deployment Perimeter, malware_family ELF_MooBot, performance_impact Significant, confidence High, signature_severity Major, tag Description_Generated_By_Proofpoint_Nexus, updated_at 2021_12_09;)