Versions (4)
Version DetailsCurrent
Rev: 3 • Jan 15, 2019, 12:00 PMET MALWARE Observed Cryptor Ransomware CnC Domain (e3kok4ekzalzapsf .onion .ws in TLS SNI)
alert tls $HOME_NET any -> $EXTERNAL_NET any (msg:"ET MALWARE Observed Cryptor Ransomware CnC Domain (e3kok4ekzalzapsf .onion .ws in TLS SNI)"; flow:established,to_server; tls.sni; content:"e3kok4ekzalzapsf.onion.ws"; endswith; reference:md5,4b6f0113007cddea4ad31237add23786; classtype:command-and-control; sid:2026806; rev:3; metadata:affected_product Windows_XP_Vista_7_8_10_Server_32_64_Bit, attack_target Client_Endpoint, created_at 2019_01_15, deployment Perimeter, malware_family CryptorRansomware, confidence High, signature_severity Major, tag Ransomware, tag Description_Generated_By_Proofpoint_Nexus, updated_at 2020_09_16, mitre_tactic_id TA0011, mitre_tactic_name Command_And_Control, mitre_technique_id T1071, mitre_technique_name Application_Layer_Protocol;)
Jan 15, 2019, 12:00 PM
Sep 16, 2020, 12:00 PM
Sep 21, 2024, 3:00 AM
Sep 25, 2025, 9:34 PM
rules/emerging-malware.rules