alert dns $HOME_NET any -> any any (msg:"ET MALWARE Win32/Teslacrypt Ransomware .onion domain (epmhyca5ol6plmx3)"; dns.query; content:"epmhyca5ol6plmx3"; nocase; depth:16; reference:md5,a6061196c9df9364d48c01bea83d6cb7; reference:url,www.sophos.com/en-us/threat-center/threat-analyses/viruses-and-spyware/Troj~EccKrypt-D/detailed-analysis.aspx; classtype:trojan-activity; sid:2020882; rev:4; metadata:attack_target Client_Endpoint, created_at 2015_04_09, deployment Perimeter, malware_family Win32_Teslacrypt, signature_severity Major, tag Ransomware, tag Description_Generated_By_Proofpoint_Nexus, updated_at 2020_08_20, mitre_tactic_id TA0040, mitre_tactic_name Impact, mitre_technique_id T1486, mitre_technique_name Data_Encrypted_for_Impact;)