alert udp $HOME_NET any -> $EXTERNAL_NET any (msg:"ET MALWARE Win32/Denisca.A CnC Beacon"; content:"|7c 2a 26|"; depth:3; fast_pattern; content:"|7c|"; distance:0; content:"|7c|"; distance:16; within:1; content:"|7c|"; distance:0; pcre:"/\x7c[a-f0-9]{16}\x7c\d+\x7c$/"; reference:md5,0075c4d976984436443b30926ad818dd; classtype:command-and-control; sid:2021385; rev:1; metadata:attack_target Client_Endpoint, created_at 2015_07_07, deployment Perimeter, malware_family Win32_Denisca_A, signature_severity Major, tag c2, updated_at 2019_07_26, mitre_tactic_id TA0010, mitre_tactic_name Exfiltration, mitre_technique_id T1041, mitre_technique_name Exfiltration_Over_C2_Channel;)