alert http $HOME_NET any -> $EXTERNAL_NET any (msg:"ET MALWARE W32/TrojanSpy.MSIL Set Done Day CnC Beacon"; flow:established,to_server; http.uri; content:"/features/get/new/mac/"; fast_pattern; http.header_names; to_lowercase; content:!"|0d 0a|user-agent|0d 0a|"; content:!"|0d 0a|content-"; content:!"|0d 0a|accept-"; content:!"|0d 0a|connection|0d 0a|"; reference:url,www.microsoft.com/security/portal/threat/encyclopedia/entry.aspx?Name=TrojanSpy%3AMSIL%2FCrime.B; classtype:command-and-control; sid:2016535; rev:4; metadata:attack_target Client_Endpoint, created_at 2013_03_05, deployment Perimeter, signature_severity Major, tag c2, updated_at 2024_04_20, mitre_tactic_id TA0010, mitre_tactic_name Exfiltration, mitre_technique_id T1041, mitre_technique_name Exfiltration_Over_C2_Channel;)