alert dns $HOME_NET any -> any any (msg:"ET MALWARE Scarlet Mimic DNS Lookup 20"; dns.query; content:"firefox.spdns.de"; startswith; nocase; endswith; fast_pattern; reference:url,researchcenter.paloaltonetworks.com/2016/01/scarlet-mimic-years-long-espionage-targets-minority-activists/; classtype:trojan-activity; sid:2022430; rev:6; metadata:created_at 2016_01_27, confidence Medium, signature_severity Major, tag Description_Generated_By_Proofpoint_Nexus, updated_at 2024_04_13;)