Rule History

alert tcp $HOME_NET any -> $EXTERNAL_NET any (msg:"ET MALWARE njrat ver 0.7d Malware CnC Callback (Keylogging)"; flow:from_client,established; content:"|00|kl|7C 27 7C 27 7C|"; nocase; fast_pattern; pcre:"/^\d{1,6}\x00kl\x7c/i"; reference:md5,bbc68c34bb2dac3ae382ecf785bdb441; classtype:command-and-control; sid:2019222; rev:3; metadata:created_at 2014_09_23, confidence Medium, signature_severity Major, tag Description_Generated_By_Proofpoint_Nexus, updated_at 2019_07_26;)